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Short Answers on Lab 5 and Lab 6.docx

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PSYC 2650
Dan Meegan

Short Answer on Lab 5 (Fan Effect – Semantic Memory) - Each concept is represented as a node and each node is connected through interconnections of different strengths - These differences in strengths is due to differences in experience - When a node is activated, it is activated 100% and its activation is spread amongst its nodes (not necessarily evenly! Depends on strength of connections) o Subthresholds are when the node does not get enough activation to summon attention but thresholds can be added together to form a summation - Evidence for network organization lies in semantic priming o Hints  Purpose of hint is to help us remember other material  By activating node from hint, you hope that activation spreads to to-be-remembered material o Lexical decision task  Given 2 words and have to ask if both are words  Yes of they are, no for one is or neither are  Forces participant to process information  First word is priming word  If second word is primed by first word, it will be recognized as a word faster and result in faster RTs  E.g. bread is prime word, butter would be recognized faster than bike would be - A concept that has lots of connections (high degree of fan) has its activation spread more than a concept that has less connections (low degree of fan) - In turn, a concept that has a high degree of fan will show longer RTs than a concept with a low degree of fan and therefore less information attached to it - Sentence verification – shown a variety of sentences, some people have only 1 place associated with them and some places have only 1 person associated with them (1-1), some places have 2 people associated with them and some people have 2 places associated with them (2-1) and some places and people have 2 people and places associated with them respectively (2-2), then given recognition task (asked if word in CAPS was a word in previous stage) o Found that concepts that had less associations where the fastest to identify and as more associations were with the concept, the longer identification takes Short Answer on Lab 6 (Categorization – Sentence Verification) - Collins and Quillian - Based on 2 characteristics: o 1. Principle of inheritance: concept inherits characteristics from all concepts it is nested in o 2. Principle of hierarchy: concepts are nested among other concepts and are placed as high as they can be in hierarchy to reduce redundancy - Given list of sentences and participant has to verify if they are correct or not o The larger the semantic distance between the concept and the statement in a correct sentence, the longer it took to ve
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