Cognitive Psychology: Language Flashcards
Three things we need to understand a piece of text
- We must perceive and identify individual words
- Process the word in context of the sentence and construct the meaning of it
- Integrate this sentence within its context
What is eye-tracking?
measure how long people actually spend looking at a word when reading (camera monitors your eye movements, longer = more difficult to recognise word)
What is a lexical decision task?
measure how long people take to indicate that a strong of letters is a word (longer to say yes = more difficult to recognise word, often used in conjunction with priming)
What is a naming task?
measure how long people take to start saying a word (pronounce it as quickly as possible without stuttering or mispronouncing, longer = difficult to recognise word)
What are three factors affecting word recognition?
- Word frequency: commonly used words are recognised more easily than infrequent words (high frequency = teacher, low frequency = armadillo, it takes longer to recognise low frequency words)
- Predictability: predictable words are recognised more easily than those in neutral or misleading contexts (pp’s read an incomplete sentence and then attempt to recognise a single word)
- Neighbourhood effects: word identification can be speeded when similar words exist in the language
What is the difference between orthographic and phonological neighbourhood effects?
- Orthographic neighbourhood: the number of words that can be formed by changing one letter while maintain letter position ‘Tank, task, rank’
- Phonological neighbourhood: the number of words that can be formed by changing one phoneme of a word ‘gait, bait, get’
Morton’s Logogen Model (1969,1979)
- A logogen is a collector of evidence
- When enough evidence is collected, then the threshold is reached, the logogen fires, and the word is recognised
- High frequency words have a lower threshold for firing, so low frequency words take longer (i.e. cat vs cot)
- The cognitive component of the logogen model explains how sentence context can affect recognition and the semantic info from the sentence activates it, lowering their threshold (therefore decrease the amount of info needed to fire the logogen)
Logogens can be thought of as as “word detectors”.
Each logogen has an activation threshold which needs to be met before it fires.
Word superiority effect (Task, Result & Conclusion)
- Task: stimulus – mask – forced choice
- Result: 10% improvement in performance with the whole word compared to a single letter
- Conclusion: its easier to identify a letter in the context of a word than in isolation
Interactive activation model: McClelland & Rumelhart (1981,1982)
used to explain the word superiority effect
1. Contains feature detectors, which can detect letter features, such as vertical and horizontal lines
2. Letters that contain the activated feature would also become activated
3. The output of the letter detectors would then activate word level detectors which contained these letters
- Types of connections: excitatory and inhibitory
- Connections run in both directions: so that the network tends to evolve towards a state of activation in which everything is consistent
- Cannot account for hie we can recognise words that have been mis-spelled (transposed letter priming = jugde instead of judge)
- These findings can be accounted for in recent models in which letter position is not fixed – Spatial coding model (Davis 2010)
Dual-route model: Coltheart et al (2001)
- Direct route: connects the visually presented word to the whole word’s mental representation, used for high-frequency or familiar words
- Phonological route: accesses the mental representations of words by using grapheme-to-phoneme conversion rules, used for reading low-frequency and non-words
Difference between phonological and surface dyslexia?
Phonological dyslexia: Difficulty with reading non-words.
Phonological dyslexia assumes a selective deficit in developing the phonological route.
Surface dyslexia: Problems reading irregular words
When presented with an irregular word, readers use the lexical route.
Surface dyslexia assumes a selective deficit in the lexical route.
Results in difficulty in pronouncing irregular words (i.e., ‘pint’/‘have’).
What is a syntax?
- the words in a sentence aren’t just strung together one after the other, they are structured into phrases and clauses, can be depicted in tree diagrams
- Each sentenced can be broken down to smaller constituents (nodes), which are connected via branches
- The noun and verb phrases can then be combined to make a sentence
- Syntax refers to the way in which words in a sentence are grouped together
What is syntactic ambiguity?
- Where a sentence may have more than one interpretation, given the potential grammatical function of the individual words
- Researchers often investigate how people process ambiguous sentences in order to develop theories of syntactic parsing
What are two types of syntactic ambiguity?
- Global ambiguity: ones that remain ambiguous even when you get to the end of the sentence (the spy observed the politician with binoculars)
- Temporal ambiguity: starts of being ambiguous but able to be resolved when you reach the end of the sentence (while anna dressed the baby threw up)
Theories of parsing: Garden Path theory (serial model) and what is parsing?
The term ‘parsing’ relates to the analysis of the syntactic or grammatical structure of a sentence. So, if we ‘parse’ a sentence, we are assigning syntactic structure to it.
Only one syntactic structure is initially considered, and the sentence meaning is not involved in the selection of this structure. If the simplest structure is incorrect, then then sentence meaning can influence re-analysis. The simplest structure is chosen, following:
a) Minimal attachment – we would choose to build the tree that has the fewest nodes/ branches
b) Late closure – sometimes both trees have the same number of nodes, so we should interpret the incoming material that was most recent