Category effects in episodic recognition: Are item noise accounts sufficient?

Maguire, Angela, Humphreys, Michael and Dennis, Simon (2002). Category effects in episodic recognition: Are item noise accounts sufficient?. In: Proceedings of: 27th Annual Interdisciplinary Conference (AIC). 27th Annual Interdisciplinary Conference, Jackson Hole, Wyoming, U.S.A., (). 3-8 February 2002.

Author Maguire, Angela
Humphreys, Michael
Dennis, Simon
Title of paper Category effects in episodic recognition: Are item noise accounts sufficient?
Conference name 27th Annual Interdisciplinary Conference
Conference location Jackson Hole, Wyoming, U.S.A.
Conference dates 3-8 February 2002
Proceedings title Proceedings of: 27th Annual Interdisciplinary Conference (AIC)
Publication Year 2002
Sub-type Oral presentation
Total pages 1
Language eng
Abstract/Summary Item noise accounts assert that interference in episodic recognition is generated by overlap between the representation of a test item and the items that appeared in the study list. If a study list contains items from categories, such accounts predict that discriminability between targets and distractors from a presented category should degrade as the number of items in the category increases. In addition, item noise models have no mechanism for distinguishing between taxonomic categories, such as Brisbane, Sydney and Melbourne, and associate categories such as bed, snooze and night. Furthermore, item noise models suggest that within category discrimination should be easier than between category discrimination where both categories were presented at study. In a series of eight experiments, the nature of the category (taxonomic versus associative), the number of items from the category (one versus five), presentation type (blocked versus distributed) and presentation location within the category (first item versus last item) were manipulated. Recognition memory was assessed using both yes/no and two-alternative forced choice procedures, where the distractor items were either the most representative exemplar from the taxonomic categories, or the prototype from the associative categories. For taxonomic categories, while there were strong bias effects as a function of number of items in the category in yes/no recognition, the only effect on discriminability was a lower A' for items in the distributed, first presentation, five item category condition. Note this is the one condition for which participants may be unaware that the study list contains categories during encoding. Furthermore, in the forced choice paradigm, there was no effect of the between/within category manipulation. For associative categories, again there were strong bias effects as a function of number of items in yes/no recognition. However, there was also a decrease in both yes/no and forced choice discriminability as the number of items increased. In addition, there was a decrease in yes/no discriminability for the last item in the five item categories for blocked presentation. Such a pattern is inconsistent with item noise accounts, but would occur if participants were activating the prototypical item during study (i.e. an implicit associative response), storing an item to context association, and then using the item to retrieve contexts at test (i.e. a context noise model).
Subjects 1701 Psychology
Keyword Episodic recognition
Item noise
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: School of Psychology Publications
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Created: Tue, 29 Jun 2010, 13:40:31 EST by June Temby on behalf of Faculty of Social & Behavioural Sciences