Place theory of hearing explains pitch perception by the

Location of vibration on the basilar membrane

The blind spot of the eye occurs where

The optic nerve leaves the retina

Sensation, Perception and Attention MCQs 2026

98 questions with detailed answers · 20 from past papers · 10 quiz batches available

📚 Psychology📄 20 Past-Paper Qs✓ Free · No Login Needed

Read each question, think about the answer, then click Show Answer to reveal the correct option and explanation. Load 10 at a time so it stays manageable — perfect for one-topic study sessions on the bus or during a break.

Page 1 of 1Questions 1–10 of 98

Q1easy
The cochlea is the principal organ for
1. AHearing
2. BVision
3. CTaste
4. DSmell
💡 Explanation:
The cochlea in the inner ear converts sound vibrations into neural signals. Hair cells within it are essential for hearing.
Q2hard
Place theory of hearing explains pitch perception by the
1. ANumber of taste buds activated
2. BSize of the pupil
3. CSpeed of eye movement
4. DLocation of vibration on the basilar membrane
💡 Explanation:
Place theory proposes that different sound frequencies stimulate different places along the basilar membrane. The brain uses this location information to perceive pitch.
Q3easy
The size of the pupil is controlled mainly by the
1. ARetina
2. BIris
3. CCochlea
4. DCornea only
💡 Explanation:
The iris is the colored muscle structure that changes pupil size. It regulates the amount of light entering the eye.
Q4medium
The blind spot of the eye occurs where
1. AThe optic nerve leaves the retina
2. BThe lens becomes transparent
3. CCones are most concentrated
4. DThe iris changes color
💡 Explanation:
The blind spot is located at the optic disc, where the optic nerve exits the eye. There are no photoreceptors at this point.
Q5easy
The optic nerve carries visual information from the retina to the
1. AMiddle ear
2. BSpinal cord only
3. CBrain
4. DAdrenal gland
💡 Explanation:
Ganglion cell axons leave the retina to form the optic nerve. This nerve transmits visual information toward the brain for further processing.
Q6easy
Cones in the retina are mainly responsible for
1. ABalance in the inner ear
2. BPain perception in skin
3. CSmell identification
4. DColor and fine-detail vision
💡 Explanation:
Cones support color perception and sharp visual detail, especially in bright light. They are concentrated in and around the fovea.
Q7easy
Rods in the retina are most useful for
1. AVision in dim light
2. BColor vision in bright light
3. CDetecting taste chemicals
4. DHearing high pitch sounds
💡 Explanation:
Rods are highly sensitive photoreceptors that work well in low light. They do not provide detailed color vision.
Q8easy
Sensory adaptation refers to
1. ALearning a new motor skill
2. BReduced sensitivity to constant stimulation
3. CDamage to a sensory nerve
4. DA sudden increase in attention
💡 Explanation:
Sensory adaptation occurs when sensitivity decreases during continuous or repeated stimulation. It allows attention to shift toward changing information.
Q9hard
Weber's law states that the just noticeable difference depends on
1. AThe observer's age only
2. BA fixed physical amount for all stimuli
3. CA constant proportion of original intensity
4. DThe number of choices in a test
💡 Explanation:
Weber's law holds that the detectable difference is a constant proportion of the original stimulus intensity. A heavier stimulus therefore requires a larger physical change to notice.
Q10easy
The just noticeable difference is another name for the
1. ADifference threshold
2. BAbsolute threshold
3. CSubliminal threshold
4. DTerminal threshold
💡 Explanation:
The just noticeable difference is the smallest detectable difference between two stimuli. It is also called the difference threshold.
Q11medium
The absolute threshold is the minimum stimulation needed to detect a stimulus about
1. A10 percent of the time
2. B25 percent of the time
3. CAlways without error
4. D50 percent of the time
💡 Explanation:
In psychophysics, the absolute threshold is commonly defined as detection of a stimulus 50 percent of the time. It marks the lower limit of reliable awareness.
Q12easy
The clearest distinction between sensation and perception is that sensation detects stimuli while perception
1. AReplaces sensory receptors
2. BOrganizes and interprets sensory input
3. COccurs only during sleep
4. DDepends only on reflexes
💡 Explanation:
Sensation is the detection of physical energy by sensory receptors. Perception is the organization and interpretation of that information into meaningful experience.
Q13medium
In Gestalt psychology, the principle of proximity means that we tend to group together objects that are
1. ANear each other
2. BOpposite in color only
3. CVery loud
4. DHidden from view
💡 Explanation:
The Gestalt law of proximity states that items close together are perceived as belonging together. It is a basic principle of perceptual organization.
Q14medium
The kinesthetic sense tells us about
1. ABlood oxygen level
2. BPosition and movement of body parts
3. CBrightness of colors
4. DSmell intensity
💡 Explanation:
Kinesthesis provides information from muscles, tendons and joints about body position and movement. It helps coordinate voluntary action.
Q15easy
The vestibular sense provides information about
1. ATaste quality
2. BLanguage fluency
3. CBalance and head movement
4. DBlood glucose level
💡 Explanation:
The vestibular system in the inner ear detects head movement and body orientation. It is essential for balance and equilibrium.
Q16hard
Convergence is a depth cue based on
1. AInward turning of the eyes for near objects
2. BColor contrast in the retina
3. CAdaptation of taste buds
4. DSound wave frequency only
💡 Explanation:
Convergence is a binocular cue produced when the eyes turn inward to focus on nearby objects. The brain uses the degree of muscle tension as distance information.
Q17hard
Signal detection theory emphasizes that detection depends on sensory sensitivity and
1. ABlood pressure
2. BEye color
3. CDecision criterion
4. DMuscle strength
💡 Explanation:
Signal detection theory separates actual sensitivity from the observer's response criterion. Expectations, motivation and costs of errors can shift decisions.
Q18medium
A subliminal stimulus is one that is
1. AAlways consciously reported
2. BStronger than pain threshold
3. CIdentical to attention span
4. DBelow the threshold of conscious awareness
💡 Explanation:
Subliminal stimuli are below the level of conscious detection. They may be processed weakly, but they are not reliably reported as consciously perceived.
Q19medium
Psychophysics studies the relationship between
1. ADreams and personality only
2. BPhysical stimuli and sensory experience
3. CHormones and digestion only
4. DBrain size and intelligence only
💡 Explanation:
Psychophysics examines how physical properties of stimuli relate to subjective sensations and judgments. Thresholds and scaling are central topics in this field.
Q20hard
Gate-control theory explains pain as being influenced by a neural gate in the
1. ALens of the eye
2. BCochlea
3. CSpinal cord
4. DPituitary gland
💡 Explanation:
Gate-control theory proposes that pain signals can be modulated by gating mechanisms in the spinal cord. Attention, emotion and other nerve activity can influence perceived pain.
Q21easy
Olfaction is the sense of
1. ASmell
2. BTaste
3. CBalance
4. DTouch
💡 Explanation:
Olfaction refers to smell. Odor molecules stimulate receptors in the nasal cavity that send information to olfactory pathways.
Q22easy
Gustation is the sense of
1. AHearing
2. BTaste
3. CVision
4. DBalance
💡 Explanation:
Gustation refers to taste. Taste receptors respond to chemicals in food and drink and contribute to flavor perception.
Q23hard
The attentional blink refers to difficulty detecting a second target when it appears
1. AAfter a full night of sleep
2. BIn a different language only
3. COutside the visual field
4. DSoon after a first target
💡 Explanation:
The attentional blink occurs in rapid serial visual presentation when a second target is missed shortly after a first target. It reflects temporary limits in attentional processing.
Q24medium
Shape constancy is the tendency to perceive an object as having the same shape even when
1. AThe object stops existing
2. BThe retina has no cones
3. CIts retinal image changes with viewing angle
4. DThe sound becomes louder
💡 Explanation:
Shape constancy allows familiar objects to appear stable despite changes in retinal projection. A door, for example, is perceived as rectangular even when seen at an angle.
Q25easy
Sustained attention is best described as the ability to
1. ANotice only one color
2. BSleep through stimulation
3. CChange the lens shape
4. DMaintain focus over time
💡 Explanation:
Sustained attention is the capacity to keep focus on a task or stimulus for an extended period. It is important in vigilance and continuous performance tasks.
Q26hard
The Stroop effect demonstrates difficulty in
1. ADetecting dim light
2. BInhibiting an automatic response
3. CBalancing while walking
4. DSmelling familiar odors
💡 Explanation:
In the Stroop task, naming the ink color is slowed when the printed word names a different color. This reveals interference from automatic reading.
Q27medium
Inattentional blindness occurs when a person fails to notice a visible object because
1. AThe retina has no rods
2. BThe object has no color
3. CHearing is blocked
4. DAttention is focused elsewhere
💡 Explanation:
Inattentional blindness shows that seeing requires attention as well as sensory input. A visible stimulus may be missed when attention is occupied by another task.
Q28medium
The cocktail party effect refers to noticing
1. AOne's name in an unattended conversation
2. BOnly bright colors in daylight
3. CA louder taste sensation
4. DThe size of the pupil
💡 Explanation:
The cocktail party effect shows that personally meaningful information can capture attention even from an unattended channel. Hearing one's name is the classic example.
Q29easy
Selective attention is the process of
1. ASleeping during stimulation
2. BDetecting only taste stimuli
3. CFocusing on one stimulus while ignoring others
4. DRemembering every detail equally
💡 Explanation:
Selective attention allows a person to concentrate on relevant input while filtering competing information. It is necessary because attentional capacity is limited.
Q30easy
Bottom-up processing begins with
1. AExpectations before any stimulus
2. BSensory data from receptors
3. CA fixed cultural belief
4. DLong-term plans only
💡 Explanation:
Bottom-up processing is data-driven and starts with sensory input. Higher-level interpretations are built from the incoming information.
Q31medium
Top-down processing is strongly influenced by
1. AExpectations and prior knowledge
2. BOnly receptor fatigue
3. CThe absence of memory
4. DRandom muscle movement
💡 Explanation:
Top-down processing uses knowledge, context and expectations to interpret sensory input. It is especially important when information is incomplete or ambiguous.
Q32medium
Perceptual constancy means that we perceive objects as
1. AAlways changing size randomly
2. BVisible only in the fovea
3. CUnrelated to prior experience
4. DStable despite changes in sensory input
💡 Explanation:
Perceptual constancy allows objects to seem stable in size, shape or color despite changes in viewing conditions. It helps maintain a consistent world.
Q33medium
Linear perspective is a
1. ABinocular cue requiring both eyes
2. BMonocular depth cue
3. CTaste cue
4. DHormonal cue
💡 Explanation:
Linear perspective is a monocular cue in which parallel lines appear to converge with distance. It can be used with only one eye.
Q34medium
A binocular cue for depth perception is
1. ALinear perspective
2. BTexture gradient
3. CRetinal disparity
4. DInterposition
💡 Explanation:
Retinal disparity uses the slightly different images received by the two eyes. The brain compares these differences to judge depth.
Q35medium
Figure-ground organization refers to the ability to
1. AChange hormone levels voluntarily
2. BHear only low-frequency sounds
3. CMeasure reaction time only
4. DSeparate an object from its background
💡 Explanation:
Figure-ground perception lets us distinguish a focal object from the surrounding background. It is a fundamental form of perceptual organization.
Q36easy
Divided attention is required when a person
1. ASleeps without dreaming
2. BSees only one color
3. CPerforms two tasks at the same time
4. DCloses both eyes
💡 Explanation:
Divided attention involves distributing mental resources across more than one task. Performance often declines when tasks compete for limited capacity.
Q37hard
The early filter model of attention is associated with
1. AJean Piaget
2. BIvan Pavlov
3. CCarl Rogers
4. DDonald Broadbent
💡 Explanation:
Broadbent proposed an early selection model in which information is filtered before full semantic processing. It became a foundational theory of selective attention.
Q38medium
Habituation is a decrease in response after
1. ARepeated presentation of the same stimulus
2. BA single spinal injury
3. CTotal loss of receptors
4. DA change in chromosome number
💡 Explanation:
Habituation is a simple form of learning in which response declines after repeated harmless stimulation. It differs from sensory adaptation because it reflects reduced behavioral response.
Q39medium
A perceptual set is a readiness to perceive stimuli in a particular way due to
1. ARandom nerve damage only
2. BExpectations and context
3. CAbsence of learning
4. DPupil size alone
💡 Explanation:
Perceptual set is shaped by expectations, experiences, motives and context. It can influence how ambiguous information is interpreted.
Q40medium
Relative size is used in perception as a
1. ATaste cue
2. BHearing threshold
3. CMonocular depth cue
4. DHormonal signal
💡 Explanation:
Relative size is a monocular depth cue: if two similar objects are assumed equal in size, the smaller retinal image is perceived as farther away. It helps judge distance from one eye.
Q41medium
Visual accommodation refers to the
1. AGrouping of nearby objects
2. BLoss of attention over time
3. CDetection of sound pitch
4. DLens changing shape to focus images
💡 Explanation:
Accommodation is the change in lens shape that focuses light from near or far objects on the retina. It is controlled by muscles around the lens.
Q42medium
Dark adaptation is the process by which visual sensitivity
1. ADecreases permanently after sleep
2. BBecomes unrelated to rods
3. CIncreases after entering darkness
4. DDepends only on the iris color
💡 Explanation:
Dark adaptation occurs as the visual system becomes more sensitive in low light. Rods contribute strongly to this increased sensitivity.
Q43hard
Feature detectors are neurons that respond selectively to
1. ABlood sugar levels
2. BSpecific visual features
3. CEndocrine glands
4. DLong-term goals
💡 Explanation:
Feature detectors in visual cortex respond to features such as edges, angles or movement. They help build complex visual perception from simpler elements.
Q44hard
Opponent-process theory of color vision is especially useful for explaining
1. AColor afterimages
2. BSound localization
3. CTouch pressure
4. DTaste adaptation only
💡 Explanation:
Opponent-process theory proposes paired color channels such as red-green and blue-yellow. It explains why staring at one color can produce an opposite-color afterimage.
Q45medium
The trichromatic theory of color vision proposes
1. AOne receptor for all colors
2. BOnly rod-based color vision
3. CNo role for cones
4. DThree types of color receptors
💡 Explanation:
The trichromatic theory states that color vision depends on three types of cones sensitive to different wavelength ranges. Their combined activity produces many perceived colors.
Q46medium
The Gestalt principle of closure means that we tend to
1. AIgnore all incomplete figures
2. BHear hidden sounds only
3. CFill in gaps to perceive a whole
4. DSee only moving objects
💡 Explanation:
Closure is the tendency to complete incomplete patterns mentally. It helps us perceive whole forms even when parts are missing.
Q47medium
The phi phenomenon refers to the perception of
1. AApparent motion from still images
2. BPain without receptors
3. CSmell without chemicals
4. DSpeech without sound
💡 Explanation:
The phi phenomenon is the illusion of movement when stationary lights or images are shown in sequence. It is a classic example of perceptual construction.
Q48easy
Attention span refers broadly to the
1. ASize of the retina
2. BDuration one can maintain focus
3. CNumber of endocrine glands
4. DPitch of a sound wave
💡 Explanation:
Attention span describes how long a person can keep attention directed toward a task or stimulus. It is affected by interest, fatigue and task demands.
Q49easy
Sensory receptors are specialized cells that
1. AProduce only emotions
2. BDetect specific forms of stimulation
3. CStore long-term plans
4. DControl grammar rules
💡 Explanation:
Sensory receptors respond to particular forms of energy such as light, sound, pressure or chemicals. Their activity starts the process of sensation.
Q50medium
Transduction in sensation means the conversion of
1. APhysical energy into neural signals
2. BMemories into dreams
3. CHormones into reflexes
4. DSpeech into grammar
💡 Explanation:
Transduction occurs when sensory receptors convert physical stimuli such as light, sound or pressure into neural impulses. It is the first step in sensory processing.
Q51Past Paper · PPSC/FPSC/NTSmedium
Perceptual constancy refers to perceiving objects as
1. Achanging with every retinal change
2. Bidentical to their retinal images
3. Cstable in size, shape, and color despite changing sensory input
4. Dalways larger when closer
💡 Explanation:
Size, shape, and color constancy allow stable object perception even though proximal stimuli on the retina continually change.
Q52easy
Interposition (overlap) as a depth cue means that
1. Acloser objects cast larger retinal images
2. Btexture becomes denser with distance
3. Chigher objects are always farther
4. Dan object that blocks another is perceived as closer
💡 Explanation:
When one object partially occludes another, the occluding object is judged nearer — the monocular cue of interposition.
Q53medium
Conductive hearing loss typically results from problems in the
1. Aauditory cortex
2. Bcochlear hair cells
3. Cauditory nerve
4. Douter or middle ear
💡 Explanation:
Conductive loss involves impaired transmission through the outer/middle ear (e.g., wax, otosclerosis); sensorineural loss involves cochlea or auditory nerve.
Q54easy
Linear perspective is an example of a
1. Abinocular depth cue
2. Bmonocular depth cue
3. Cchemical sense cue
4. Dvestibular cue
💡 Explanation:
Linear perspective (parallel lines appearing to meet in the distance) can be seen with one eye and is therefore monocular.
Q55Past Paper · PPSC/FPSC/NTSeasy
The sense of smell is called
1. Aolfaction
2. Bgustation
3. Ckinesthesia
4. Dproprioception
💡 Explanation:
Olfaction is the chemical sense of smell; gustation is taste.
Q56Past Paper · PPSC/FPSC/NTSeasy
Taste buds detect which basic taste qualities including
1. Aonly sweet and bitter
2. Bsweet, sour, salty, bitter, and umami
3. Csweet, sour, and spicy only
4. Dmetallic and alkaline only
💡 Explanation:
Modern taste science recognizes five basic qualities: sweet, sour, salty, bitter, and umami (savory).
Q57easy
Flavor perception depends heavily on the interaction of
1. Avision and hearing only
2. Btouch and pain only
3. Cbalance and kinesthesia
4. Dtaste and smell
💡 Explanation:
Much of what people call 'taste' is actually flavor, which combines gustatory and olfactory (retronasal) input.
Q58easy
The skin senses include pressure, temperature, and
1. Aolfaction
2. Bgustation
3. Cpain
4. Dequilibrium
💡 Explanation:
Cutaneous senses include touch/pressure, warmth, cold, and pain (nociception).
Q59Past Paper · PPSC/FPSC/NTSmedium
Gate-control theory of pain was proposed by
1. APavlov and Watson
2. BMelzack and Wall
3. CSkinner and Thorndike
4. DWeber and Fechner
💡 Explanation:
Melzack and Wall's gate-control theory proposes that spinal 'gates' can modulate pain signals before they reach the brain.
Q60medium
Convergence as a depth cue depends on
1. Athe inward turning of the eyes for near objects
2. Brelative size of familiar objects
3. Clinear perspective in drawings
4. Dtexture gradients on surfaces
💡 Explanation:
For nearby objects the eyes turn inward (converge); the brain uses the degree of convergence as a binocular depth cue.
Q61medium
Kinesthesis refers to the sense of
1. Abody position and movement of body parts
2. Bbalance from the inner ear only
3. Csmell of chemical molecules
4. Dpain from tissue damage
💡 Explanation:
Kinesthesis (kinesthesia) provides feedback about limb position and movement via receptors in muscles, tendons, and joints.
Q62Past Paper · PPSC/FPSC/NTSeasy
The vestibular sense is primarily concerned with
1. Ahearing high frequencies
2. Bdetecting light intensity
3. Cbalance and spatial orientation
4. Ddetecting chemical tastes
💡 Explanation:
Vestibular receptors in the semicircular canals and otolith organs sense head movement and gravity, supporting balance.
Q63Past Paper · PPSC/FPSC/NTSmedium
Binocular disparity is a cue for
1. Acolor constancy
2. Bloudness perception
3. Cpitch discrimination
4. Ddepth perception
💡 Explanation:
Slightly different retinal images in the two eyes (binocular disparity/retinal disparity) provide a powerful cue to depth.
Q64easy
The Gestalt principle of closure refers to the tendency to
1. Aignore incomplete figures
2. Bperceive only straight lines
3. Cfill in gaps to perceive a complete object
4. Dfocus exclusively on background
💡 Explanation:
Closure leads us to mentally complete incomplete figures so they appear whole.
Q65Past Paper · PPSC/FPSC/NTSeasy
Transduction in sensation means
1. Aconverting stimulus energy into neural impulses
2. Bstoring sensory data in STM
3. Ccomparing two stimuli
4. Dselecting which sense to attend to
💡 Explanation:
Transduction is the conversion of physical energy (light, sound, pressure, chemicals) into electrochemical signals the brain can process.
Q66easy
Figure-ground organization means that we tend to
1. Aseparate an object from its background
2. Bignore all depth cues
3. Csee only colors, not shapes
4. Dadapt completely to constant stimuli
💡 Explanation:
In figure-ground perception, one part of the visual field stands out as the figure while the rest recedes as ground.
Q67Past Paper · PPSC/FPSC/NTSmedium
According to the trichromatic theory of color vision, the three cone types are most sensitive to
1. Ablack, white, and gray
2. Bred, green, and blue
3. Cyellow, blue, and black
4. Dorange, purple, and cyan
💡 Explanation:
Young-Helmholtz trichromatic theory proposes three cone photopigments maximally sensitive to short, medium, and long wavelengths (roughly blue, green, red).
Q68easy
The fovea is specialized for
1. Asharp central vision and color detail
2. Bperipheral motion detection only
3. Cnight vision via rods
4. Dbalance and vestibular sense
💡 Explanation:
The fovea is densely packed with cones and provides the highest visual acuity and color discrimination for central vision.
Q69hard
Phi phenomenon is the illusion of
1. Acolor afterimages
2. Bsize constancy failure
3. Capparent motion from stationary flashing lights
4. Dtaste adaptation
💡 Explanation:
The phi phenomenon is perceived continuous motion created by sequential flashing of stationary lights — a Gestalt discovery.
Q70hard
Visual agnosia is an inability to
1. Ahear high pitches
2. Bfeel pain
3. Cmaintain balance
4. Drecognize objects despite intact basic vision
💡 Explanation:
In visual agnosia, sensory vision may be relatively preserved, but the person cannot identify or recognize what is seen.
Q71hard
Prosopagnosia specifically involves difficulty recognizing
1. Afaces
2. Bspoken words
3. Cmusical melodies
4. Dbody position
💡 Explanation:
Prosopagnosia (face blindness) is impaired recognition of familiar faces, often linked to fusiform face area dysfunction.
Q72medium
Subliminal stimuli are those that are
1. Aabove absolute threshold and always conscious
2. Bpainful by definition
3. Cdetected only by rods
4. Dbelow absolute threshold and not consciously detected
💡 Explanation:
Subliminal means below the absolute threshold for conscious awareness, though weak effects on behavior remain debated.
Q73Past Paper · PPSC/FPSC/NTSeasy
The just noticeable difference (JND) is also called the
1. Aabsolute threshold
2. Bdifference threshold
3. Cterminal threshold
4. Dsubliminal threshold
💡 Explanation:
Difference threshold (JND) is the smallest detectable difference between two stimuli.
Q74Past Paper · PPSC/FPSC/NTSeasy
Rods are primarily responsible for
1. Acolor vision in bright light
2. Bfine visual acuity
3. Cvision in dim light
4. Ddetecting only red wavelengths
💡 Explanation:
Rods are highly light-sensitive and support scotopic (dim-light) vision but do not mediate color; cones handle photopic color vision.
Q75Past Paper · PPSC/FPSC/NTSeasy
Gestalt psychology emphasizes that
1. Aperception is built only from isolated sensations
2. Blearning is purely association
3. Cbehavior is shaped only by reinforcement
4. Dthe whole is different from the sum of its parts
💡 Explanation:
Gestalt psychologists argued that the brain organizes sensory input into meaningful wholes that cannot be reduced to mere sums of parts.
Q76medium
Opponent-process theory of color vision was proposed by
1. AYoung and Helmholtz
2. BFechner
3. CEwald Hering
4. DWeber
💡 Explanation:
Hering's opponent-process theory explains color vision via antagonistic pairs: red-green, blue-yellow, and black-white.
Q77medium
Signal detection theory emphasizes that detection depends on
1. Astimulus intensity alone
2. Breceptor density alone
3. Cwavelength of light only
4. Dstimulus strength and the observer's decision criterion
💡 Explanation:
Signal detection theory separates sensitivity from response bias: hits, misses, false alarms, and correct rejections depend on both signal and criterion.
Q78Past Paper · PPSC/FPSC/NTSmedium
Afterimages that appear in complementary colors support which theory
1. Aplace theory
2. Bfrequency theory
3. Cgate-control theory
4. Dopponent-process theory
💡 Explanation:
Staring at a color fatigues one opponent channel, so the complementary color dominates when the stimulus is removed — classic evidence for opponent processes.
Q79Past Paper · PPSC/FPSC/NTSmedium
Weber's law states that the just noticeable difference is
1. Aa fixed absolute amount for all stimuli
2. Bindependent of stimulus intensity
3. Ca constant proportion of the original stimulus
4. Ddetermined only by neural fatigue
💡 Explanation:
Weber's law holds that ΔI/I is roughly constant: the detectable change is proportional to the intensity of the original stimulus.
Q80easy
The visible spectrum for humans is approximately
1. A400–700 nanometers
2. B100–300 nanometers
3. C800–1200 nanometers
4. D10–50 nanometers
💡 Explanation:
Human vision detects electromagnetic wavelengths roughly from violet (~400 nm) to red (~700 nm).
Q81medium
Accommodation in vision refers to
1. Aadaptation to darkness
2. Bchanging lens shape to focus near or far objects
3. Cdilation of the pupil
4. Dmovement of the eyeballs together
💡 Explanation:
Ciliary muscles alter the curvature of the lens so light from near or distant objects focuses on the retina.
Q82medium
Myopia (nearsightedness) occurs when the image focuses
1. Aexactly on the retina
2. Bbehind the retina
3. Con the cornea
4. Din front of the retina
💡 Explanation:
In myopia the eyeball is relatively long (or the lens too strong), so the focal point falls in front of the retina; distant objects appear blurred.
Q83Past Paper · PPSC/FPSC/NTSeasy
The minimum stimulus intensity that can be detected 50% of the time is called the
1. Aabsolute threshold
2. Bdifference threshold
3. Cterminal threshold
4. Dadaptation level
💡 Explanation:
Absolute threshold is the weakest detectable stimulus intensity under ideal conditions, typically measured at 50% detection accuracy.
Q84Past Paper · PPSC/FPSC/NTSeasy
Sensation is best defined as
1. Ainterpretation of sensory information
2. Bdetection of physical energy by sense organs
3. Cstorage of sensory memories
4. Dorganization of stimuli into patterns
💡 Explanation:
Sensation is the process by which sensory receptors and the nervous system detect and encode stimulus energy; perception is the interpretation of that input.
Q85medium
Inattentional blindness refers to
1. Afailing to notice a visible stimulus when attention is elsewhere
2. Bpermanent damage to rods
3. Cinability to smell
4. Dloss of vestibular function
💡 Explanation:
When attention is focused on one task, people often miss unexpected but fully visible events — inattentional blindness.
Q86Past Paper · PPSC/FPSC/NTSmedium
Selective attention is demonstrated by the
1. AWeber fraction
2. Bcocktail party effect
3. Cblind spot
4. Dopponent process
💡 Explanation:
The cocktail party effect — noticing one's name in unattended speech — illustrates selective attention amid competing inputs.
Q87medium
Dark adaptation involves increased sensitivity of the
1. Acones only within 1 second
2. Bossicles of the middle ear
3. Crods as rhodopsin regenerates
4. Dtaste buds on the tongue
💡 Explanation:
In darkness, rhodopsin regenerates in rods and sensitivity to dim light rises over many minutes — dark adaptation.
Q88easy
Top-down processing in perception is guided by
1. Aonly wavelength of light
2. Bonly amplitude of sound
3. Cprior knowledge, expectations, and context
4. Dreceptor adaptation alone
💡 Explanation:
Top-down processing uses stored knowledge and expectations to interpret ambiguous or incomplete sensory data.
Q89Past Paper · PPSC/FPSC/NTSeasy
The ossicles of the middle ear are the
1. Acochlea, vestibule, and semicircular canals
2. Bpinna, canal, and eardrum
3. Cmalleus, incus, and stapes
4. Dbasilar membrane, tectorial membrane, and hair cells
💡 Explanation:
The three tiny bones — hammer (malleus), anvil (incus), and stirrup (stapes) — transmit and amplify vibrations from the eardrum to the oval window.
Q90medium
The organ of Corti is located in the
1. Amiddle ear
2. Bcochlea
3. Csemicircular canals
4. Deustachian tube
💡 Explanation:
The organ of Corti sits on the basilar membrane inside the cochlea and contains hair cells that transduce sound into neural signals.
Q91Past Paper · PPSC/FPSC/NTSmedium
The blind spot in the eye occurs because
1. Athere are no rods in the fovea
2. Bthe cornea lacks blood vessels
3. Ccones are absent at the periphery
4. Dthere are no photoreceptors where the optic nerve exits
💡 Explanation:
At the optic disc, axons leave the eye as the optic nerve, so no rods or cones are present — creating the blind spot.
Q92Past Paper · PPSC/FPSC/NTSeasy
The amplitude of a sound wave is most closely related to perceived
1. Aloudness
2. Bpitch
3. Ctimbre only
4. Dlocation only
💡 Explanation:
Greater amplitude generally produces greater perceived loudness; frequency primarily determines pitch.
Q93hard
Feature detectors in the visual cortex were studied extensively by
1. APavlov and Skinner
2. BHubel and Wiesel
3. CMaslow and Rogers
4. DWundt and Titchener
💡 Explanation:
Hubel and Wiesel showed that cortical neurons respond selectively to specific visual features such as edges and orientations.
Q94medium
A perceptual set is
1. Athe absolute threshold for vision
2. Ba mental predisposition that influences perception
3. Cdamage to the optic nerve
4. Dthe blind spot itself
💡 Explanation:
Perceptual set is a readiness, based on expectations, context, or culture, to perceive stimuli in a particular way.
Q95hard
Place theory of hearing best explains perception of
1. Ahigh-frequency sounds
2. Blow-frequency sounds only
3. Cloudness exclusively
4. Dlocalization in darkness
💡 Explanation:
Place theory holds that different basilar-membrane locations respond maximally to different frequencies; it accounts well for high-frequency pitch coding.
Q96medium
Size constancy is aided by
1. Aaccurate depth information
2. Bcomplete sensory adaptation
3. Cabsence of monocular cues
4. Dclosing one eye permanently
💡 Explanation:
Knowing an object's distance helps the visual system scale retinal image size so perceived size remains roughly constant.
Q97hard
Frequency theory of pitch perception is most applicable to
1. Aultrasonic frequencies
2. Bvery high pitches above 5000 Hz
3. Clow-frequency sounds
4. Dcolor afterimages
💡 Explanation:
Frequency (volley) theory proposes that the rate of neural firing matches sound frequency and works best for lower pitches.
Q98Past Paper · PPSC/FPSC/NTSeasy
The Gestalt principle of proximity states that elements that are
1. Adifferent in color are grouped
2. Bclose together are perceived as a group
3. Cmoving in opposite directions form a group
4. Didentical in size are never grouped
💡 Explanation:
Proximity: stimuli that are near one another tend to be perceived as belonging together.

Jump to page:

Sensation, Perception and Attention MCQs 2026

More Psychology Topics