The effect of aging on associative memory for

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The effect of aging on associative memory for semantically-related word pairs Adrien Folville, Emma Delhaye & Christine Bastin Cyclotron Research Center, University of Liège, Belgium INTRODUCTION Older adults’ episodic memory is characterized by difficulties in linking individual elements in a complex memory, reflecting an associative memory deficit, whereas their memory for individual elements remains relatively preserved (1). Participants Objectives The current study evaluated the impact of the use of semantic prior knowledge on associative memory performance in healthy aging (Study 2). Moreover, we evaluated recollection and familiarity processes involved in such a task through a Remember/Know/Guess (RKG) paradigm in young adults (Study 1) (2). Study 1 Study 2 Young (n=20) Young (n=24) Old (n=23) Age 21.75 (1.51) 22.29 (2.11) 70.47 (4.75) Education 15.00 (0.29) 15.33 (1.73) 15.60 (2.44) Mill-Hill 24.55 (3.36) 24.16 (4.46) 27.82 (4.10)* Mattis / 137.52 (3.38) Materials & procedure Encoding: 60 word pairs , 30 semantically related (categorical relations) and 30 unrelated. * Significant group difference, p < .01 Study 1: results 4 sec 2 (test) x 2 (relatedness) repeated-measures ANOVA: Item test: 12 related and 12 unrelated ‘old’ targets, 6 related and 6 unrelated ‘new’ lures. * * Associative test: 12 related and 12 unrelated intact pairs, 12 related and 12 unrelated recombined pairs. * Response: Study 1 Study 2 Yes No Remember Know Guess Yes No * Significant difference, p < .05 Study 2: results 2 (group) x 2 (test) x 2 (relatedness) repeated-measures ANOVA: * CONCLUSION * The results from Study 1 suggest that young participants rely more on familiarity to recognize related than unrelated word pairs. As for older participants, findings from Study 2 suggest that they have difficulties to discriminate intact and recombined related pairs, producing higher false alarm rates and a more liberal bias. This could reflect a greater difficulty to inhibit absolute familiarity due to pre-experimental knowledge. * Significant group difference, p < .001 REFERENCES (1) M. Naveh-Benjamin et al. (2008). Psychology and Aging, 23, 104-118. (2) J. Gardiner et al. (1996). Canadian Journal of Experimental Psychology, 50, 114-122. Cyclotron Research Centre | http://www.cyclotron.ulg.ac.be | Christine Bastin | Christine.Bastin@ulg.ac.be