Cherry's "cocktail party effect" (1953) demonstrated that people can follow one conversation in a noisy room. What did his dichotic listening studies also reveal?
A: People can accurately report the content of the unattended message
B: People notice their own name in the unattended channel, suggesting some semantic processing occurs outside attention
C: Attention is entirely controlled by bottom-up stimulus features
D: The brain processes both auditory streams equally until a decision is made
Correct: People notice their own name in the unattended channel, suggesting some semantic processing occurs outside attention
Participants shadowing one audio channel heard almost nothing of the other channel's content — but they reliably noticed their own name when it appeared. This "own-name effect" suggested that the unattended channel is not completely filtered out; some meaningful content (particularly personally relevant stimuli) receives processing even without focused attention. It challenged early filter models that assumed complete early attenuation of unattended inputs.
Simons and Chabris's gorilla experiment (1999) is a classic demonstration of:
A: Change blindness — failure to detect changes in a scene over time
B: Inattentional blindness — failure to notice an unexpected, clearly visible object when attention is focused elsewhere
C: Divided attention — the difficulty of performing two tasks simultaneously
D: Attentional blink — a brief period after detecting one target when a second is missed
Correct: Inattentional blindness — failure to notice an unexpected, clearly visible object when attention is focused elsewhere
Participants asked to count ball passes were so focused on the task that roughly half failed to notice a person in a gorilla suit walking through the scene and beating their chest. This inattentional blindness shows that we do not see everything in front of our eyes — perception requires attention. The findings have serious real-world implications for eyewitness testimony, surgical monitoring, and road safety.
Change blindness refers to:
A: The failure to detect stimuli that suddenly appear in peripheral vision
B: The striking failure to notice large changes in a visual scene, particularly across a brief interruption
C: The inability to identify familiar faces after brain injury
D: Adaptation to constant visual stimuli so they become invisible over time
Correct: The striking failure to notice large changes in a visual scene, particularly across a brief interruption
Rensink et al. demonstrated that people fail to detect substantial changes to images (e.g., an aircraft engine disappearing) when the change occurs during a brief flicker, cut, or distraction. This implies that vision does not automatically create a rich, stable internal representation of the world — we store far less than we believe. Change blindness has implications for eyewitness reliability and the design of safety-critical systems.
Top-down attentional control differs from bottom-up attentional capture in which way?
A: Top-down attention is driven by stimulus salience; bottom-up by goals and expectations
B: Top-down attention is goal-directed, guided by expectations and task demands; bottom-up is triggered automatically by salient or unexpected stimuli
C: Top-down attention is processed in the occipital lobe; bottom-up in the frontal lobe
D: Both are equivalent in speed but differ in duration
Correct: Top-down attention is goal-directed, guided by expectations and task demands; bottom-up is triggered automatically by salient or unexpected stimuli
Top-down (endogenous) attention reflects voluntary, goal-directed selection — you direct attention where your task requires. Bottom-up (exogenous) attention is stimulus-driven — a sudden loud noise or flashing light captures attention automatically, regardless of your goals. In everyday life both systems interact: you may be searching for your keys (top-down) and be distracted by your phone notification (bottom-up).
The "attentional spotlight" metaphor suggests that:
A: Attention can only process one object at a time, regardless of location
B: Attention acts like a spotlight that can be directed to regions of space, enhancing processing within its beam
C: Attention is uniformly distributed across the visual field
D: Attentional resources are exhausted after prolonged focus
Correct: Attention acts like a spotlight that can be directed to regions of space, enhancing processing within its beam
The spotlight metaphor (Posner, 1980) captures how spatial attention can be directed to a location before an eye movement, enhancing detection of stimuli that appear there. The spotlight can be moved covertly (without eye movements), is influenced by both top-down goals and bottom-up salience, and can vary in size (zooming in narrows focus but increases resolution; zooming out broadens it but reduces detail).
Sustained attention (vigilance) refers to the ability to maintain focused attention over extended periods. Research on vigilance consistently shows that:
A: Performance on vigilance tasks improves steadily over time as the task becomes familiar
B: Detection accuracy declines markedly after 20–30 minutes on monotonous monitoring tasks
C: Caffeine has no effect on sustained attention
D: Vigilance is entirely determined by sleep quality the night before
Correct: Detection accuracy declines markedly after 20–30 minutes on monotonous monitoring tasks
The "vigilance decrement" — a reliable decline in detection of rare, unpredictable target signals over time — has been observed since Mackworth's wartime radar-monitoring studies. It reflects both resource depletion and disengagement when events are rare. This has major implications for safety-critical monitoring roles (air traffic control, radiology, surgical supervision) and is a key reason for mandatory break schedules and alert systems in such environments.
Attention
Cherry's "cocktail party effect" (1953) demonstrated that people can follow one conversation in a noisy room. What did his dichotic listening studies also reveal?
About this quiz
Attention is the cognitive process that selects which information reaches conscious awareness. Far from being a single faculty, attention encompasses selective focus, the ability to sustain concentration, and the capacity to divide resources across multiple tasks.
This quiz covers the key models and experiments in attention research — from the cocktail party effect and inattentional blindness to top-down versus bottom-up control.