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We found evidence of recognition memory in the nonanalytic recognition when photos were shown 5 times, as with the straightforward recognition task this was at a low level at about 5% greater than chance. There was no evidence of recognition memory with analytic recognition. This is consistent with our predictions that nonanalytic recognition would be greater than analytic recognition. In contrast to what we were expecting we found no evidence of an emotional enhancement of memory in analytic or nonanalytic recognition. However, this may have been due to the very low levels of recognition memory. Section 3. Experiment 1E: Recognition followed by Remember / Section 3.1. Introduction Know / Guess judgement In an attempt to uncover more of the differences between memory for emotional and neutral material we examined recognition followed by a Remember / Know / Guess (RKG) judgement. Similarly to the analysis of Ochsner (2000) we used the Yonelinas, Kroll, Dobbins, Lazzara, & Knight (1998) model of recognition memory to examine recollection and familiarity. We added the Guess category in line with other research using the Remember- Know paradigm with two alternative forced choice tests (Bastin & Van der Linden, 2003). Section 3.2. Method Design 61
In this experiment we investigated the influence of emotion on recognition and on a subsequent Remember, Know, Guess judgement. Participants Twelve University of <strong>Nottingham</strong> students participated in Experiment 1E (Mean age 24.42 years (SD 7.92 yrs); 7 female). Materials Procedure. The same materials were used as in Experiments 1A-D. The procedure was identical to that of Experiment 1A, except for the different instructions given to participants during the test phase. Participants were asked to perform a recognition judgement, for which instructions were the same as Experiment 1B. After each recognition judgement participants were asked to indicate their level of awareness of the memory by indicating whether they Remember / Know / Guess that they recognise the photo. Participants then indicated ‘Remember’ if their recognition was accompanied by some recollective experience, ‘Know’ if the photograph was familiar but they had no recollective experience, or ‘Guess’ if the photograph was not familiar nor was it accompanied by some recollective experience but they guessed that they had seen it earlier. They indicated this by pressing ‘R’, ‘K’ or ‘G’ on the keyboard. Participants were also given written instructions explaining how to differentiate between RKG (Bastin & Van der Linden, 2003). Their understanding of these instructions was checked and they were asked to justify their RKG judgement following the two example tasks. Section 3.3. Results 62
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THE EMOTIONAL ENHANCEMENT OF MEMORY
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the memory effects. Surprisingly, t
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and motivation was waning. Most imp
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Meta-analysis: Experiments 6-10…
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negative, neutral or positive objec
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Figure 6.2. Summary of findings fro
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Table 3.5. Criteria for giving resp
Page 15 and 16: avoidance task ………………
Page 17 and 18: loved one could block their ability
Page 19 and 20: eport, physiological response and c
Page 21 and 22: Section 1.2. What effects do emotio
Page 23 and 24: due to external influences. In cont
Page 25 and 26: of naturally occurring emotions or
Page 27 and 28: ecause mood inductions generally re
Page 29 and 30: (e.g. Conway et al., 1994). Memory
Page 31 and 32: alternatives (Lockhart, 2000). The
Page 33 and 34: equired participants to distinguish
Page 35 and 36: een found when memory is assessed b
Page 37 and 38: peripheral elements of emotional an
Page 39 and 40: processing of the specific content
Page 41 and 42: failure to retrieve episodic memori
Page 43 and 44: effects on cognitive processes, eve
Page 45 and 46: ecollection and familiarity within
Page 47 and 48: emotional influence on memory. In t
Page 49 and 50: year (Dolcos et al., 2005). There a
Page 51 and 52: e suitable for investigating memory
Page 53 and 54: possible that having to distinguish
Page 55 and 56: of photographs of people, animals a
Page 57 and 58: Retrieval phase: Participants then
Page 59: y the ANOVA’s. These are only rep
Page 62 and 63: Table 2.1: Experiments 1 and 2: Res
Page 64 and 65: In these experiments the influence
Page 68 and 69: For the recognition test, which was
Page 70 and 71: Section 5. Experiments 2A and 2B: P
Page 72 and 73: items that had been seen previously
Page 74 and 75: Section 7. Experiment 2E: Recogniti
Page 76 and 77: Table 2.2. Experiment 2: Results of
Page 78 and 79: For the ‘know’ responses the ma
Page 80 and 81: Section 8. Experiment 2 - General D
Page 82 and 83: Presentation of stimuli in blocked
Page 84 and 85: It is possible that the act of maki
Page 86 and 87: enhancement can be influenced by re
Page 88 and 89: levels of memory between the positi
Page 90 and 91: the performance of any subsequent t
Page 92 and 93: experiment to provide a set of targ
Page 94 and 95: Experimental stimuli were presented
Page 96 and 97: Recognition performance in all thre
Page 98 and 99: Analysis of RKG responses We analys
Page 100 and 101: Further signal detection analysis o
Page 102 and 103: stimuli, which corresponded with mo
Page 104 and 105: could be generalised to the real-wo
Page 106 and 107: paradigm was first introduced by Tu
Page 108 and 109: The nature of recognition memory an
Page 110 and 111: The relation between Remember/Know/
Page 112 and 113: We proposed that a Remember respons
Page 114 and 115: to either the RKN or SSN memory tas
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change in a dimension (e.g., a ligh
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were prompted to indicate by key pr
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When you think the picture was not
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conducted to further analyse the ma
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interactions in the ANOVAs were fou
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Table 3.9. Same/Similar/New task: N
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Orthogonal contrasts revealed that
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Table 3.11. Remember/Know/New task:
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suitable responses were not equable
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We found that more ‘remember’ r
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say that context is easier to remem
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Levine & Bluck, 2004; Storbeck & Cl
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Figure 4.1. Examples of pairs of ne
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Familiarity i) Word frequency and w
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were not sure if there was going to
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Table 4.1. Experiment 5: Proportion
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memory for positive stimuli. These
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whether visual specificity for posi
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Figure 4.3. Examples of stimuli. St
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0.59 (-1.65 to 2.55; 0.98) respecti
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Section 3.3. Results The data for t
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Figure 4.4. Mean average specific a
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The possibility of a response bias
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Section 4. Experiment 7: Biases in
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of an attentional encoding explanat
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esults will be found as for Experim
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of one second was displayed before
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Table 4.3. Mean responses (SE) for
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greater recognition for the objects
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Table 4.4. Mean average (SE) number
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eveal a significantly longer total
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difference between scenes with a ne
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of memory for positive objects was
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independent of attention, which is
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lack of a central-peripheral trade-
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to a detriment in memory for periph
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Alternative measures of memory: Ass
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associative binding (Touryan et al,
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greatly diminish or disappear with
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Factors unrelated to intrinsic emot
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faces or places (Puri & Wojciulik,
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We predict that the pattern of memo
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ackground they had seen in the stud
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component (F(2,34) = 5.45, MSe = 0.
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Associative Memory In the associati
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The number of fixations made were a
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longer total gaze duration on the e
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.54], nor on backgrounds of scenes
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the background when presented later
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Section 3.1. Introduction Section 3
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were then shown, preceded by a 20 s
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2.56, p < .001, partial eta 2 = .71
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(negative, neutral, positive) and s
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object in a scene. There was no sig
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eradication of any emotional enhanc
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possible that the emotional stimuli
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central-peripheral trade off in the
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Section 3.3. Results Results of the
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Planned contrasts revealed the impa
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component (object, background) inte
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ackground of the scene. There was n
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Section 3.4. Discussion There was e
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identify with eye movement recordin
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Table 5.7. Average ratings (standar
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emotional influence on the results
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Figure 5.7. Specific and general re
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ecognition of positive and negative
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Figure 5.9. Specific and General Re
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Section 5.3. Eye movement results T
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.01). Post-hoc Tukey’s HSD were u
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The number of fixations made on dif
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(F(1.79,5.37) = 7.12, MSe = 232535.
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emotional and neutral object [F(1,6
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Figure 5.16. Experiments 7 - 10: Av
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may be that the scenes were easier
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Chapter 6. Discussion In the final
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In chapter 4 I extended the experim
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Figure 6.3 Summary of findings from
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alternative measures of attention h
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distribution of visual attention re
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designing and conducting experiment
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contributed to the difficulty in cr
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whether these perceptual difference
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Richardson-Klavehn, 2005) with the
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High Threshold Theory (Macmillan &
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participant and the artificial prod
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References Adolphs, R. (2002). Reco
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Buchanan, T. W. (2007). Retrieval o
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Davidson, R. J. (1994). On emotion,
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Gardiner, J. M., Ramponi, C., & Ric
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James, W. (1884). What is an emotio
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Levine, L. J., & Bluck, S. (2004).
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components. Journal of Experimental
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Rowe, G., Hirsh, J. B., & Anderson,
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Talmi, D., Schimmack, U., Paterson,
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Zajonc, R. B. (1968). Attitudinal e
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Appendix 2.2. ANOVA Analyses for Ex
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Table 2.2.4. Experiment 1: Separate
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Appendix 3.2. Contamination of Retr
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Appendix 4.1 Analysis of Same, Simi
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Scene component* emotion* response
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Section 4.1.2 Analysis for Experime
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Emotion* Response type F(4,68) = 0.
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esponse F(1,17) = 0.25, New respons
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Scene component* Response type Tuke
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Same response Similar response New
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Effect ANOVA result Response type F
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Similar response New response Same
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Tukey’s post hocs: For objects Sa
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esponse F(1,17) = 1.95, Similar res
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