PSYC*2650 Chapter 5: Paying Attention Flashcards
What is selective attention?
The skill through which a person focuses on one input or task while ignoring other stimuli also on the scene
What is the difference between overt attention and covert attention?
- Overt: Spatial visual selection through overt eye movements
- Covert: changes in attention without eye movements
What occurs during a dichotic listening task?
Participants hear two different verbal messages simultaneously, with one being presented to each ear
In a dichotic listening task, what is the attended channel?
The stimulus the participant was told to pay attention to/ the one they are trying to perceive
In a dichotic listening task, what is the unattended channel?
The stimulus the participant was told to ignore/ the one they are not trying to perceive
During a dichotic listening task, how did researchers ensure participants were paying attention to the correct input?
Participants had to perform a task called shadowing
What is shadowing?
A task in which participants repeat back a verbal input, word for word, as they hear it
During a dichotic listening task, were participants better at describing the physical attributes or the semantic content of the unattended channel?
Physical attributes
What is inattentional blindness?
A pattern in which people fail to see a prominent stimulus, even if they’re staring right at it
What occurs during an inattentional blindness study?
Participants are instructed to point their eyes at a dot and make judgments about a “+” shown off to the side, and during that time, the dot briefly changes shapes
During an inattentional blindness study, were participants able to detect the shape change of the fixation target if they weren’t warned about it?
No
What is a fixation target?
A visual mark at which participants point their eyes, or fixate on during experimental procedures
What is inattentional deafness?
A pattern in which people fail to hear prominent stimuli if they are unexpected
What is inattentional numbness?
A pattern in which people fail to feel stimuli if the inputs are unexpected
What are the two contracting theories behind inattentional blindness, deafness, and numbness?
- People fail to notice the stimuli
- People do notice the stimuli, but forgot that it occurred
What is change blindness?
A pattern in which perceivers either don’t see or take a long time to notice large scale changes in visual stimulus
What occurs during a change blindness study?
Participants are shown pairs of pictures that differ slightly and separated by a brief blank interval and must determine what about the images is different
What is the premise of the late stage hypothesis?
Selective attention operates at a late stage of processing, so all inputs make it briefly into consciousness, then selection occurs and only the attended input is remembered
How is attention proposed to influence the lateral geniculate nucleus ?
Attention changes the flow of signals within the nervous system before they reach the brain, thus changes in attention affect activity in the lateral geniculate nucleus
What does the biased competition theory propose about attention?
That attention functions by shifting the priorities of neurons, so they are more responsive to certain inputs
What are the two ways detectors in the visual system can be primed?
- By activating detectors so they’re more sensitive
- By biasing detectors so they’re more likely to respond to the desired input
What is spatial attention?
The ability to allocate processing resources to, or focus attention on, a specific location in space
What is a limited-capacity system?
A system in which mental resources are limited, so extra resources supplied to one process results in withdrawal of resources from another
T or F: Perceiving inputs does not involve mental resources.
False
In terms of a limited-capacity system, why are people unable to listen to two messages at the same time?
Because it requires more resources than are available