- In an animal study, a rat is placed in a chamber where a brief light turns on for 1 second every 15 seconds. The rat initially orients toward the light, but over repeated presentations the orienting response declines. The experimenter then presents a single, different stimulus (a brief tone) and immediately returns to the light presentations. Data summary (orienting responses out of 5 trials):
- Light trials 1–5: 5/5
- Light trials 6–10: 2/5
- After tone, light trials 11–15: 4/5
Which pattern is most consistent with dishabituation of the orienting response to the light?
Answer: A decrease in orienting across light trials followed by a temporary increase in orienting to the light after the tone.
This question assesses dishabituation in animal orienting behaviors. Habituation reduces responses to repeated stimuli, and dishabituation temporarily reinstates them after a novel interruption. The rat's orienting to the light declines over trials, then a tone is presented, followed by increased orienting to subsequent lights. Choice D correctly identifies this as dishabituation, with decreased orienting pre-tone and temporary increase post-tone. Choice B is incorrect as it describes increasing orienting, suggesting sensitization instead of habituation. To recognize habituation in new studies, observe if initial high responses fade with repetition. For dishabituation, look for data showing a spike in response to the habituated stimulus immediately after novelty, then decline.
- A researcher measures skin conductance response (SCR) to a brief, non-painful tactile vibration on the wrist. The vibration is delivered repeatedly at a fixed interval, and SCR decreases over trials. To test whether the decrease reflects habituation rather than a permanent loss of responsiveness, the researcher introduces a different stimulus (a brief cool air puff to the neck) once, then delivers the wrist vibration again. Which result would most strongly support that the original SCR decrease was due to habituation?
Answer: SCR to the wrist vibration increases after the air puff compared with immediately before it, indicating dishabituation of the response to vibration.
This question tests understanding of how dishabituation demonstrates that habituation is not permanent response loss. Habituation involves decreased responding to repeated stimuli, while dishabituation shows this decrease is reversible through presentation of a different stimulus. The researcher observed decreased skin conductance responses (SCR) to repeated wrist vibrations, then introduced a different stimulus (neck air puff), followed by testing the wrist vibration again. Answer B correctly identifies the result supporting habituation: SCR to the wrist vibration increases after the air puff compared with immediately before it, indicating dishabituation of the response to vibration. This recovery proves the original decrease was habituation, not permanent damage or fatigue. Answer A would suggest permanent loss, C describes sensitization, and D compares different body locations rather than tracking changes in response to the same stimulus. Dishabituation serves as a diagnostic tool to confirm that decreased responding represents habituation rather than sensory adaptation or response system fatigue.
- A researcher studies habituation in rodents using a mild, non-painful air puff directed at the whiskers once per minute. Initially, rats show robust whisker retraction. After 15 identical puffs, retraction magnitude is small. The researcher then turns on a bright light for 5 seconds (a different stimulus) and delivers the same air puff again. Retraction magnitude increases compared with the last few air-puff trials. Which conclusion is most consistent with these observations?
Answer: The increased retraction after the light indicates dishabituation because a novel stimulus restored responding to the air puff.
This question tests understanding of habituation and dishabituation in animal research. Habituation is the decrease in responding to repeated stimuli, while dishabituation involves recovery of the habituated response following presentation of a different stimulus. The rats showed classic habituation with decreasing whisker retraction to repeated air puffs, then experienced a bright light (novel stimulus), followed by increased retraction to the same air puff. Answer A correctly identifies this as dishabituation: the increased retraction after the light indicates a novel stimulus restored responding to the air puff. Answer B misidentifies the decrease as sensitization (which would show increased responding over trials), C contradicts the definition by calling increased responding habituation, and D incorrectly invokes classical conditioning principles. To recognize dishabituation, look for: decreased responding to stimulus A through repetition, introduction of different stimulus B, and temporary recovery of responding when A is presented again.
- Researchers observe habituation in an infant looking-time paradigm. A 6-month-old infant is shown the same high-contrast checkerboard image repeatedly; each presentation ends when the infant looks away. Over successive presentations, the infant's looking time decreases, suggesting reduced orienting to the repeated stimulus. The researcher then briefly shows a novel stimulus (a colorful face) for one trial and immediately returns to the checkerboard. Observation summary: looking time to the checkerboard is low just before the novel face; looking time to the checkerboard increases on the first presentation after the face, then declines again across the next few checkerboard trials. Which response is most consistent with habituation followed by dishabituation in this infant?
Answer: Looking time decreases across repeated checkerboard trials, then temporarily increases when the checkerboard reappears after the novel face.
This question assesses understanding of habituation and dishabituation in infant attention paradigms. Habituation is the reduction in response, such as looking time, to a repeated stimulus, whereas dishabituation involves a temporary resurgence of that response after a novel stimulus is introduced. Here, the infant's looking time to the repeated checkerboard decreases, showing habituation, and then a novel face is presented before returning to the checkerboard. Choice A correctly illustrates this by noting the temporary increase in looking time to the checkerboard post-novel stimulus, followed by a decline, which demonstrates dishabituation. Choice B fails as it describes sensitization, where looking time increases with repetition, which contradicts the observed decrease in habituation. For identifying habituation in other scenarios, look for diminishing engagement with unchanging stimuli over trials. To spot dishabituation, verify if a new stimulus causes a brief spike in response to the original, then resumption of decline.
- A researcher presents a series of identical mild odors (same concentration) to participants once every 2 minutes and asks them to rate perceived intensity on a 1–10 scale. Ratings decrease across repeated presentations. After a 10-minute break with fresh air, ratings to the same odor increase compared with the last pre-break rating. Which statement is most consistent with the observed change after the break?
Answer: The increase in ratings after the break reflects spontaneous recovery of responding after habituation, not dishabituation.
This question tests the distinction between spontaneous recovery and dishabituation. Habituation involves decreased responding to repeated stimuli, while dishabituation requires presentation of a different stimulus to restore responding. In this scenario, odor ratings decreased with repetition (habituation), followed by a break with fresh air, then increased ratings to the same odor. Answer B correctly identifies this as spontaneous recovery rather than dishabituation - the increase in ratings after the break reflects spontaneous recovery of responding after habituation, not dishabituation. Dishabituation would require presentation of a different stimulus (like a different odor or sensory modality), not just a break. Answer A incorrectly labels this as dishabituation, C misidentifies decreased ratings as sensitization, and D invokes reinforcement principles inappropriately. The key distinction is that spontaneous recovery occurs with time passage alone, while dishabituation requires a novel intervening stimulus.
- In a study of startle modulation, participants hear a brief burst of noise every 30 seconds and their whole-body startle is measured. Startle magnitude declines over the first 15 bursts. The researcher then presents a single burst that is slightly louder than the others, followed by the original standard burst. Startle to the standard burst increases compared to the immediately preceding standard burst.
Which statement is most consistent with dishabituation?
Answer: Startle increases to the standard burst after the slightly louder burst because the novel change restores responding
This question evaluates consistency with dishabituation in startle studies. Habituation reduces startle to bursts, while dishabituation increases it post-louder burst. The louder burst provides novelty. Choice B is consistent with dishabituation restoring responding. Choice A describes habituation, acting as a distractor. In other settings, look for specific startle increase post-novelty. Differentiate from anxiety by checking pattern.
- A researcher repeatedly presents a neutral tactile stimulus (a soft brush stroke on the forearm) while recording a participant's self-reported intensity rating. Ratings drop from "strong" to "barely noticeable" over repeated strokes, suggesting habituation. The researcher then switches briefly to a different tactile stimulus (a cool metal touch) and immediately returns to the brush stroke. Which finding is most consistent with dishabituation rather than a failure to habituate in the first place?
Answer: Brush-stroke intensity ratings increase on the first trial after the cool touch, compared with the last brush-stroke trial before the cool touch.
This question tests understanding of dishabituation using subjective intensity ratings. Habituation is the decrease in perceived intensity with repeated stimulation, while dishabituation is the recovery of perception following a novel stimulus. The participant habituated to brush strokes (ratings dropped to "barely noticeable"), then experienced a novel cool metal touch. The correct answer (A) demonstrates dishabituation because intensity ratings increase for the brush stroke after the cool touch, showing renewed sensitivity to the previously habituated stimulus. Answer B shows no habituation occurred initially, C describes enhanced habituation rather than recovery, and D introduces an irrelevant attentional instruction. The key insight is that dishabituation affects subjective perception as well as behavioral responses, with the novel stimulus temporarily restoring sensitivity to the habituated stimulus rather than permanently altering perception.
- In a laboratory study of behavioral adaptation, adult participants wear headphones and hear a 95 dB burst of white noise (500 ms) once every 30 seconds while their eye-blink startle response is recorded via EMG. Across the first 12 trials, the average blink magnitude steadily decreases. Immediately after trial 12, the researcher presents a single, novel 500 ms pure tone (1000 Hz) at the same intensity, then resumes the white-noise bursts for trials 13–15. Observations: blink magnitude is low by trial 12; it increases on the first white-noise trial after the tone, then decreases again over trials 14–15. Based on this vignette, which outcome best demonstrates dishabituation of the startle response?
Answer: Blink magnitude increases on the first white-noise trial after the pure tone, then declines again with subsequent white-noise trials.
This question tests the concept of dishabituation in the context of behavioral adaptation to repeated stimuli. Habituation refers to a decrease in response to a repeated stimulus over time, while dishabituation is the temporary recovery of that response following the presentation of a novel stimulus. In this vignette, participants initially show a decreasing startle response (blink magnitude) to repeated white-noise bursts, indicating habituation, and then a novel pure tone is introduced before resuming the white noise. Choice B is correct because it describes the increase in blink magnitude to the white noise immediately after the pure tone, followed by a decline, which exemplifies dishabituation as the novel tone restores responsiveness to the habituated stimulus. In contrast, choice A is incorrect as it describes continued habituation without any recovery, failing to capture the role of the novel stimulus in dishabituation. To recognize dishabituation in new contexts, check for a pattern where a response diminishes with repetition but temporarily rebounds after an interrupting novel event. Additionally, confirm that the response declines again with further repetition of the original stimulus, distinguishing it from sensitization where responses might increase progressively.
- A researcher studies habituation in rats using a mild light flash (100 ms) delivered every 30 seconds while measuring head-turning toward the light. Over 12 flashes, head-turning frequency declines. The researcher then changes the flash color from white to blue for one trial and immediately returns to the original white flash. The rats show increased head-turning to the first white flash after the blue flash compared to the last white flash before the blue one.
Which outcome is most consistent with dishabituation rather than sensitization?
Answer: Head-turning increases to the white flash after the single blue flash is presented
The skill being tested is distinguishing dishabituation from sensitization in animal orienting responses. Habituation decreases reactions to repeated stimuli, while dishabituation revives those reactions after a novel stimulus without overall sensitivity increase. Rats habituate to white flashes by reducing head-turning, but the blue flash introduces change. Choice B demonstrates dishabituation as increased head-turning to the subsequent white flash shows specific response recovery. Choice C fails by suggesting general heightened responsiveness, which aligns with sensitization. For new contexts, look for selective response increase to the habituated stimulus post-novelty. Differentiate by ensuring no persistent arousal elevation occurs.
- A researcher repeatedly presents a mild peppermint odor to participants for 10 seconds while measuring perceived intensity ratings. Ratings decline across trials, indicating reduced perceived intensity with repetition. Immediately after trial 6, the researcher presents a strong, novel cinnamon odor for 10 seconds, then returns to the peppermint odor. Observation: the next peppermint rating is higher than the rating on trial 6, but still lower than the initial peppermint rating on trial 1. Which outcome is most consistent with the behavioral adaptation shown?
Answer: The post-cinnamon peppermint rating is higher than trial 6 because the novel odor produces dishabituation, partially restoring responding to peppermint.
This question evaluates dishabituation in perceptual ratings of odors. Habituation causes declining perceived intensity with repeated exposure, and dishabituation partially restores it after a novel stimulus. Ratings for peppermint decrease over trials, then cinnamon is presented, followed by a higher peppermint rating than the last but lower than the first. Choice D correctly explains this as dishabituation, with the novel odor partially recovering the response. Choice B is erroneous as it claims habituation increases intensity, opposite to the decline observed. To detect habituation in sensory tasks, note if subjective reports or detections weaken with repetition. For dishabituation, verify if novelty leads to partial, not full, response recovery to the original, distinguishing from reset to baseline.
- A study tests habituation to a mild visual distractor. While participants perform a reaction-time task, a small gray square appears in the corner of the screen every 8 seconds. Eye-tracking shows that early in the session participants frequently glance at the square, but later they rarely do. Near the end, the square briefly changes shape to a triangle for one presentation, then returns to a square; glances to the square increase on the next square presentation.
Which observation is most consistent with dishabituation?
Answer: Glances increase to the square after the triangle is briefly presented
This question evaluates consistency with dishabituation in visual distraction studies. Habituation decreases glances to repeated squares, while dishabituation increases them after triangle change. The triangle provides brief novelty. Choice B is consistent with dishabituation via increased glances post-triangle. Choice A describes habituation, acting as a distractor. In new contexts, look for renewed attention after alteration. Differentiate from vigilance by checking specificity.
- A clinician uses exposure-based practice to reduce a patient's startle response to a harmless beep from a home medical device. Across repeated beeps in-session, the patient's startle response decreases. At the end of the session, a loud door slam occurs in the hallway, and then the clinician triggers the same beep again. Which result would most strongly indicate dishabituation of the startle response to the beep?
Answer: The patient startles strongly to the next beep, then shows reduced startle again as the beep repeats.
This question tests understanding of dishabituation in a clinical context. Habituation is the decrease in startle responses through repeated exposure, while dishabituation is the temporary recovery of the response following a novel stimulus. The patient habituated to the medical device beep during the session, then experienced a novel door slam. The correct answer (A) demonstrates dishabituation because the patient shows renewed startle to the next beep, followed by re-habituation with repetition, indicating the novel stimulus temporarily restored the habituated response. Answer B incorrectly shows continued habituation unaffected by the novel stimulus, C focuses on subjective experience rather than measured startle, and D describes persistent sensitization exceeding initial levels. To identify dishabituation clinically, look for temporary return of the habituated response after interruption, followed by re-habituation, which helps distinguish therapeutic progress from mere response suppression.
- A researcher repeatedly taps a participant's forearm lightly once every 5 seconds and records a reflexive withdrawal movement. Withdrawal magnitude decreases over trials. The researcher then delivers a single tap to the participant's shoulder (novel location) and immediately resumes tapping the forearm. The next forearm tap produces a larger withdrawal than the last forearm tap before the shoulder tap.
Which choice is most consistent with dishabituation?
Answer: Withdrawal increases to the next forearm tap after the novel shoulder tap is introduced
This question probes dishabituation in reflexive withdrawal movements. Habituation reduces withdrawal to repeated taps, while dishabituation reinstates it after novel location tap. The shoulder tap provides novelty. Choice B is consistent with dishabituation via increased withdrawal post-shoulder. Choice C fails by implying general increase, suggesting sensitization. In other contexts, look for specific response recovery after novelty. Check for absence of overall reflex heightening.
- In a clinical setting, a therapist uses repeated exposure to a harmless but startling phone notification sound to reduce a client's exaggerated startle response. Over multiple sessions, the client's startle to the same notification decreases. Midway through a session, the therapist unexpectedly drops a book (a sudden loud noise), and the next phone notification elicits a stronger startle than the notification immediately before the book drop. Which pattern best supports the idea that the stronger startle reflects dishabituation rather than a failure to habituate?
Answer: The client's startle to the phone notification decreases across the session until the book drop occurs, then temporarily increases on the next notification.
This question tests understanding of dishabituation in a clinical context. Habituation involves decreased responding to repeated stimuli, while dishabituation is the temporary recovery of responding following exposure to a different stimulus. The scenario describes habituation to phone notifications (decreasing startle), followed by a novel loud stimulus (book drop), then increased startle to the next notification. Answer B correctly describes the dishabituation pattern: the client's startle to the phone notification decreases across the session until the book drop occurs, then temporarily increases on the next notification. This temporal sequence distinguishes dishabituation from other explanations - Answer A compares responses to different stimuli rather than tracking changes in response to the same stimulus, C describes subjective preference unrelated to habituation, and D suggests sensitization (increasing responses) rather than habituation. The hallmark of dishabituation is the specific sequence: habituation → novel stimulus → temporary recovery.
- In a laboratory study of behavioral adaptation, adult participants wear headphones and hear a 1000-Hz tone (70 dB, 500 ms) every 20 seconds while their eyeblink startle response is recorded via EMG. Across 10 trials, mean blink amplitude decreases. Immediately after Trial 10, the researchers present a single novel stimulus (a 300-ms burst of white noise at the same intensity), then present the original 1000-Hz tone again. Observations are summarized below.
Trial block / stimulus: 1–2 (tone), 3–4 (tone), 5–6 (tone), 7–8 (tone), 9–10 (tone), 11 (white noise), 12 (tone)
Mean blink amplitude (arbitrary units): 12, 9, 7, 6, 5, 11, 10
Based on these observations, which outcome best demonstrates dishabituation in this experiment?
Answer: The blink amplitude rebounds on Trial 12 (tone) after the intervening white-noise burst
This question tests the understanding of dishabituation in the context of behavioral adaptation to auditory stimuli. Habituation refers to a decrease in response to a repeated stimulus, while dishabituation is the recovery of that response following the presentation of a novel stimulus. In this study, participants show habituation as blink amplitude decreases across repeated tone presentations, but the introduction of white noise disrupts this pattern. The correct answer, B, demonstrates dishabituation because the rebound in blink amplitude on Trial 12 indicates restored responsiveness to the familiar tone after the novel white-noise burst. In contrast, choice D fails as a distractor because it incorrectly suggests the tone becomes more salient, which would imply sensitization rather than habituation. To recognize dishabituation in new contexts, check if a novel stimulus interrupts habituation and temporarily revives the original response. Additionally, ensure the recovery is specific to the habituated stimulus and not a general arousal increase.
- A researcher observes habituation in infants using a looking-time paradigm. A 6-month-old infant is shown the same visual stimulus (a black-and-white checkerboard) repeatedly; the infant's looking time decreases over successive presentations. The researcher then briefly shows a different stimulus (a high-contrast face) and immediately returns to the checkerboard. Which observation is most consistent with dishabituation to the checkerboard following the face stimulus?
Answer: Looking time to the checkerboard increases on the first presentation after the face, relative to the last checkerboard trial before the face.
This question tests recognition of dishabituation in infant research using looking-time measures. Habituation is the decrease in responding to repeated stimuli, while dishabituation is the recovery of responding to the original stimulus after exposure to a novel stimulus. The infant habituated to the checkerboard (decreased looking time), then saw a novel face stimulus. The correct answer (A) demonstrates dishabituation because looking time to the checkerboard increases after the face presentation, showing renewed interest in the previously habituated stimulus. Answer B incorrectly shows continued habituation without recovery, C discusses the novel stimulus rather than return to the original, and D introduces an irrelevant social factor. When evaluating dishabituation, the key marker is increased responding to the original stimulus immediately after the novel stimulus, not permanent changes or responses to the novel stimulus itself.
- A researcher studying basic behavioral adaptation repeatedly presents a mild air puff to a participant's eye and measures the blink reflex. Blink magnitude decreases over trials. The researcher pauses for a short break with no stimuli, then resumes the same air puff. Which observation is most consistent with dishabituation (as opposed to spontaneous recovery after rest) in this context?
Answer: Blink magnitude increases immediately after a novel tone presented during the break, then decreases again with repeated air puffs.
This question tests the ability to distinguish dishabituation from spontaneous recovery. Habituation is the decrease in blink reflex to repeated air puffs, while dishabituation requires a novel stimulus to restore responding, unlike spontaneous recovery which occurs with rest alone. The participant habituated to air puffs (decreased blink magnitude) and then experienced a break. The correct answer (B) demonstrates dishabituation because blink magnitude increases only when a novel tone is presented during the break, then decreases again with repeated air puffs, showing that the novel stimulus was necessary for response recovery. Answer A describes spontaneous recovery (increase after rest alone), C shows continued habituation, and D incorrectly suggests stimulus intensity changes. The critical distinction is that dishabituation requires a novel stimulus to interrupt habituation, while spontaneous recovery occurs through passage of time alone, making the presence of a novel stimulus the key diagnostic feature.
- A clinic uses exposure-based practice to reduce a patient's startle response to a non-threatening doorbell sound. During sessions, the doorbell rings at a fixed volume every minute, and the patient's skin conductance response (SCR) decreases across repeated rings. Midway through a later session, a nurse accidentally drops a tray (a sudden, novel crash) in the hallway. Immediately after the crash, the next doorbell ring produces a larger SCR than the doorbell ring just before the crash.
Which interpretation is most consistent with dishabituation?
Answer: The patient's SCR increases after the tray crash because the crash restores responsiveness to the doorbell
This item evaluates understanding of dishabituation in clinical exposure to auditory stimuli. Habituation decreases physiological responses to repeated neutral stimuli, while dishabituation reinstates those responses via a novel intervening event. The patient's SCR habituates to the doorbell, but the tray crash introduces novelty. Choice B accurately reflects dishabituation as the increased SCR post-crash indicates restored sensitivity to the doorbell. Choice D fails by suggesting the crash accelerates habituation, which would decrease rather than increase SCR. In new contexts, identify dishabituation by noting response recovery after a distinct stimulus interrupts habituation. Ensure the novel stimulus is not associative or conditioning-based.
- In a classroom, a student initially startles and looks up whenever a nearby radiator makes a clicking sound. After several weeks of daily exposure, the student rarely looks up when the clicking occurs. One day, a construction crew outside produces a sudden, unfamiliar banging noise. Immediately afterward, the next radiator click causes the student to look up again.
Which choice best explains the student's renewed orienting to the radiator click?
Answer: Dishabituation occurs because the novel banging noise restores responsiveness to the familiar click
This question examines explanations for renewed orienting in habituated classroom responses. Habituation reduces startle to familiar sounds over time, and dishabituation restores it via a novel stimulus. The student habituates to the radiator click by ignoring it, but the banging noise intervenes. Answer B correctly explains the renewed looking as dishabituation, where the banging revives responsiveness. Choice A is wrong because it implies strengthened habituation, not recovery. To identify dishabituation elsewhere, note if a new stimulus precedes response to a previously habituated one. Check that the effect is transient and stimulus-specific.
- In a study of sensory adaptation, participants are exposed to a faint citrus scent while completing puzzles. Initially, they frequently comment on the scent. After 25 minutes, comments stop. The researcher then introduces a brief, unrelated stimulus: a short vibration on the chair. Immediately afterward, participants again comment that they notice the citrus scent.
Which observation is most consistent with dishabituation?
Answer: Participants comment on the citrus scent again after the brief chair vibration occurs
This question evaluates consistency with dishabituation in sensory adaptation studies. Habituation stops comments on scent over time, and dishabituation restarts them post-vibration. The vibration introduces unrelated novelty. Choice B is consistent with dishabituation through renewed comments. Choice A describes habituation, serving as a distractor. In other contexts, look for revived noticing after interruption. Ensure not performance allocation.
