Cognitive Psychology Flashcards
What is an illusion ?
Rational inferences
What are considered to be the 5 human senses ?
Vision - sight
Audition - sound
Gustation - taste
Olfaction - smell
Tactician - touch
Why have reindeer adapted to perceive ultraviolet light ?
Allows them to detect camouflaged prey
What illusion involves the misconception of line length ?
Ponzo illusion
What are some facts about light/dark adaptation ?
It helps brightness constancy
It is responsible for negative afterimages
It enables the visual system to work under different lighting conditions
What is the Ishihara test used to test ?
Colour perception
Where are rods located ?
In the peripheral retina
The luminance and wavelength of light are related to what two perceptions ?
Brightness and colour
Objects that are perceived to be brighter tend to what ?
Reflect more light
What is it called when there is a difference in image location between the eyes ?
Binocular disparity
What happens in the horopter ?
Objects falling on it will project to corresponding positions in the two references
Which Gestalt principle helps preserve the grouping of occluded objects ?
Good continuation
What are 3 evaluations of the Gestalt grouping principle ?
Some have been criticised as too imprecise
They have generally been shown to hold across a range of images
They are manifestations of the law of Pragnanz
Harmonics occur at frequencies that are what ?…
Multiples of the fundamental frequency
A complex sound consists of more than one what ?
Sinusoidal component of different frequencies
Do louder sounds have higher or lower firing rates in the auditory nerve fibres ?
Higher
What are 3 facts about sound waves ?
They require a medium to travel
They can be visualised using Ruben’s tube
They are caused by vibrations
What is the cone of confusion ?
The set positions in space where all sound produces the same binaural localisation cues
What are 3 facts about interaural time differences ?
They depend of distance between the ears
They require phase locking
They are maximal when sounds are positioned to one side of the listener
What is the lowest frequency in a sound called ?
Fundamental frequency
Which grouping principle does not apply to the perceptual organisation of sounds ?
Symmetry
What factors influence the magnitude of interaural time differences ?
Location of the source in the azimuth
Speed of sound
Size of head
What percentage of correct answers were there in Broadbent’s 1952 study ?
50% - It is very difficult to understand two messages that are presented at the same time
What is shadowing ?
Ps is presented with two messages and has to repeat back one of them
Following a dichotic listening task, which characteristics would you expect to be reported from the unattended auditory stream ?
Changes from voice to a tone
Changes from male to female
What assumptions are shared by Broadbent’s 1958 and Treisman’s 1960 model ?
Selection occurs on the basis of physical characteristics
The perceptual systems have limited capacity
Perceptual information is a subject to a selective filter