Iain Malcolm Harlow PhD

Iain Malcolm Harlow


Publications:
2013
  Source accuracy data reveal the thresholded nature of human episodic memory
Harlow, IM & Donaldson, DI 2013, 'Source accuracy data reveal the thresholded nature of human episodic memory' Psychonomic Bulletin & Review.
Episodic recollection supports conscious retrieval of past events. It is unknown why recollected memories are often vivid, but at other times we struggle to remember. Such experiences might reflect a recollection threshold: Either the threshold is exceeded and information is retrieved, or recollection fails completely. Alternatively, retrieval failure could reflect weak memory: Recollection could behave as a continuous signal, always yielding some variable degree of information. Here we reconcile these views, using a novel source memory task that measures retrieval accuracy directly. We show that recollection is thresholded, such that retrieval sometimes simply fails. Our technique clarifies a fundamental property of memory and allows responses to be accurately measured, without recourse to subjective introspection. These findings raise new questions about how successful retrieval is determined and why it declines with age and disease.
General Information
Organisations: Royal (Dick) School of Veterinary Studies.
Authors: Harlow, Iain Malcolm & Donaldson, David I..
Publication Date: 2013
Publication Information
Category: Article
Journal: Psychonomic Bulletin & Review
ISSN: 1069-9384
Original Language: English
2010
  Recollection has a threshold: Direct evidence from a novel source task
Harlow, IM & Donaldson, DI 2010, 'Recollection has a threshold: Direct evidence from a novel source task' Cognitive Neuroscience Society 17th Annual Meeting, Montreal, Canada, 17/04/10 - 20/04/10, .
General Information
Organisations: Royal (Dick) School of Veterinary Studies.
Authors: Harlow, Iain Malcolm & Donaldson, D. I..
Publication Date: 2010
Publication Information
Category: Poster
Original Language: English
  Familiarity for Associations? A Test of the Domain Dichotomy Theory
Harlow, IM, MacKenzie, G & Donaldson, DI 2010, 'Familiarity for Associations? A Test of the Domain Dichotomy Theory' Journal of Experimental Psychology: Learning, Memory, and Cognition, vol 36, no. 6, pp. 1381-1388. DOI: 10.1037/a0020610

Episodic recognition memory is mediated by functionally separable retrieval processes, notably familiarity (a general sense of prior exposure) and recollection (the retrieval of contextual details), whose relative engagement depends partly on the nature of the information being retrieved. Currently, the spec tic contribution of familiarity to associative recognition memory (where retrieval of the relationship! between pairs of stimuli is required) is not clearly understood. In this study, we tested domain dichotomy theory, which predicts that familiarity should contribute more to associative memory when stimuli are similar (within-domain) than when they are distinct (between-domain). Participants studied stimulus pairs, and at test, discriminated intact from rearranged pairs. Stimuli were either within-domain (name or image-image pairs) or between-domain (name-image pairs). Across experiments we used 2 different behavioral measures of familiarity based on receiver operating characteristic curves and a modified remember-know procedure. Both experiments provided evidence that familiarity can contribute to associative recognition: however, familiarity was stronger for between-domain pairs, in direct contrast to the domain dichotomy prediction.


General Information
Organisations: School of Philosophy, Psychology and Language Sciences.
Authors: Harlow, Iain M., MacKenzie, Graham & Donaldson, David I..
Keywords: (, , . )
Number of pages: 8
Pages: 1381-1388
Publication Date: Nov 2010
Publication Information
Category: Article
Journal: Journal of Experimental Psychology: Learning, Memory, and Cognition
Volume: 36
Issue number: 6
ISSN: 0278-7393
Original Language: English
DOIs: 10.1037/a0020610
2009
  An objective measure of unitization in an associative task
Harlow, IM & Donaldson, DI 2009, 'An objective measure of unitization in an associative task' 50th Annual Meeting of the Psychonomic Society, Boston, United States, 19/11/09 - 22/11/09, .
General Information
Organisations: Royal (Dick) School of Veterinary Studies.
Authors: Harlow, Iain Malcolm & Donaldson, D. I..
Publication Date: Nov 2009
Publication Information
Category: Poster
Original Language: English
  Behavioural and ERP measures of familiarity and recollection: Evidence against the domain dichotomy view of associative recognition
Harlow, IM & Donaldson, DI 2009, 'Behavioural and ERP measures of familiarity and recollection: Evidence against the domain dichotomy view of associative recognition'.
General Information
Organisations: Royal (Dick) School of Veterinary Studies.
Authors: Harlow, Iain Malcolm & Donaldson, D. I..
Publication Date: 2009
Publication Information
Category: Poster
Original Language: English
2008
  How does the relationship between stimuli affect the relative contribution of familiarity? Testing the domain dichotomy view of associative recognition
Harlow, IM & Donaldson, DI 2008, 'How does the relationship between stimuli affect the relative contribution of familiarity? Testing the domain dichotomy view of associative recognition' 15th Annual Meeting of the Cognitive Neuroscience Society , San Francisco, United States, 14/04/08 - 16/04/08, .
General Information
Organisations: Royal (Dick) School of Veterinary Studies.
Authors: Harlow, Iain Malcolm & Donaldson, D. I..
Publication Date: 2008
Publication Information
Category: Poster
Original Language: English
  Stimulus similarity does not boost associative familiarity: Evidence against domain dichotomy
Harlow, IM, Dolan, PO & Donaldson, DI 2008, 'Stimulus similarity does not boost associative familiarity: Evidence against domain dichotomy' 49th Annual meeting of the Psychonomic Society, Chicago, Illinois, United States, 13/11/08 - 16/11/08, .
General Information
Organisations: Royal (Dick) School of Veterinary Studies.
Authors: Harlow, Iain Malcolm, Dolan, P. O. & Donaldson, D. I..
Publication Date: 2008
Publication Information
Category: Poster
Original Language: English

Projects:
Investigating models of human episodic memory (PhD)