College aantekeningen
Lecture notes: Applied Cognitive Psychology
- Instelling
- Universiteit Leiden (UL)
This summary includes all the material covered in the lectures of the specilisation ACP in 2022.
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Lecture notes: Applied Cognitive Psychology (2022)Made by Fleur Serlie
Lecture 1: Introduction
ACP Model: Core
Outcome = cognition x environment
Cognition
Memory
Attention
Motivation
Enjoyment
Flexibility
Inhibition
Environment
Organisation
Product
Website
Tools
Goals
Vitality
Safety
Happiness
Indicators = dependent variables (assess whether goal is achieved)
Factors = independent variables (change cognition/environment)
Lecture 2: Fundamentals of Cognition
Human information processing:
1. Perceptual encoding (information coming in -> sent to thalamus -> relayed to cortical
centres)
2. Central processing (assigning meaning to information)
3. Responding (motor cortex directs/executes movement)
Perception
Low-level perception:
Eyes
Tongue
Ears
Skin
Low level phenomena:
Hering grid (lateral inhibition in retina)
Motion-after-effect (adaptation to motion)
Colour-after-effect (adaptation to colours)
1
,Bottom-up = an explanation for perceptions that start with an incoming stimulus and working
upwards until a representation of the object is formed in our minds. If we perceive sensory
info as it happens, the eyes transmit info to the brain, which puts all of the info together
e.g. saliency (brightness, contrast)
Top-down = Interpretation of incoming information. These perceptions are heavily
influenced by our expectations and prior knowledge and are not always accurate. The brain
applies what it knows to fill in the blanks and anticipate what is next.
e.g. optical illusions
Info quality ↓ = ↑ top-down influence
Attention
Broadbent’s Attentional Filter = early selection on attended channel, modality and physical
properties
Overt = physical change (e.g. head turn, saccade)
Covert = paying attention without moving the eyes
Endogenous (from the inside)
- Intentional
- Targeted
- Controlled
- Conscious
- Limited
- Top-down = concept-driven
Exogenous (from the outside)
- Not intentional
- Untargeted
- Attracted by external stimuli
- Automatic
- Bottom-up = stimulus-driven
Visual search
Methods to guide visual search:
Pop-out
Conjunction
Attentional control
Controlled (learning to drive) vs Automatic (driving after a year)
Working memory
Working memory (= a ‘camera’)
Small capacity -> Miller’s law 7 +/- 2 info pieces at a time
Short duration (max. 20 seconds)
Primacy effect = first few words remembered
Recency effect = last few words remembered
Mental workspace for complex tasks and control of behaviour
2
, Central executive = visuospatial sketchpad + phonological loop
Visuospatial sketchpad = maintain and manipulate visual info (spatial insight, mental
rotation)
Phonological loop = capacity of the phonological loop is fixed duration of speech sounds (2.5
seconds). It holds auditory information in a speech-based form and is linked to speech
perception.
Central executive (inhibit, shift and update information)
Diversity: process specific resources
Unity: shared resources
Updating = continuous monitoring and quick addition/deletion of contents in the working
memory
Inhibition
= taking the position of responses that are dominant in a given situation
Simon effect (incongruent response-stimulus location)
Stroop effect (incongruent word-colour)
Stop signal (halting response)
Shifting = cognitive flexibility to switch between different tasks or mental states
Switching cost = longer reaction time, lower accuracy
Shifting + depletion of shared resources
Long term memory
(= ‘a box with printed pictures from the camera’)
Semantic (facts) + Episodic (events)
Explicit (conscious: recall) + Implicit (unconscious: familiarity)
Stages
1. Encoding
(adding to) existing schemas, remembering list of words
Yerkes-Dodson Law: performance increases with physiological/mental arousal
(stress), but only up to a point
3
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