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Figure 5.16. Experiments 7 – 10: Average fixation duration on different components of scene Section 5.3.2. Discussion The analysis to compare eye movements across Experiments 7, 8, 9 and 10 confirmed two findings from the analysis of the individual experiments already reported and revealed two additional new findings. This meta-analysis confirmed that in Experiments 7, 8 and 10 participants looked for longer and more often at the object than background components of a scene (as measured by total gaze duration and number of fixations), whereas in Experiment 9 participants looked for longer and more often at the background than object. However, unexpectedly there was no significant interaction between emotion, scene component and experiment for number of fixations or total gaze duration. This means that there is no evidence of a lack of attention narrowing onto the negative object in scenes in Experiment 9. Although, we can conclude that despite the radically different 257
visual search strategies used by participants viewing blocked stimuli in Experiment 9 there was no difference in the influence of emotion on the pattern of memory results. This meta-analysis also confirmed that across all experiments together visual attention was narrowed onto the negative object in a scene with participants looking for longer and more often at a negative than a neutral or positive object. Correspondingly, participants looked for a shorter total gaze duration and less often at the backgrounds in scenes with a negative than neutral or positive object. This finding demonstrated the resilience of the central-peripheral trade-off in eye movements that was found in 3 experiments, and corresponded to the central-peripheral trade-off in memory. The two new key findings that were revealed by this meta-analysis relate to the average fixation duration. Firstly, there was a shorter average fixation duration in Experiment 10 than in Experiments 7, 8 and 9. One possibility is that the shorter average fixation duration in Experiment 10 reflects a more extensive search of the scene as participants move their eyes around more. The cue of the emotion may have increased the salience of the emotion of that scene and lead participants to a more extensive search of the scene to check the location of the source of the emotion. Alternatively, the cue of the emotion may have enhanced the perceived distinctiveness of each item and piqued the interest of participants to a greater degree than in the other experiments, therefore leading them to search the scene to a greater extent. Alternatively, average fixation duration has been reported to reflect level of visual processing complexity (e.g. Rayner & Pollatsek, 1989) and it 258
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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
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avoidance task ………………
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loved one could block their ability
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eport, physiological response and c
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Section 1.2. What effects do emotio
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due to external influences. In cont
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of naturally occurring emotions or
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ecause mood inductions generally re
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(e.g. Conway et al., 1994). Memory
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alternatives (Lockhart, 2000). The
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equired participants to distinguish
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een found when memory is assessed b
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peripheral elements of emotional an
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processing of the specific content
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failure to retrieve episodic memori
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effects on cognitive processes, eve
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ecollection and familiarity within
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emotional influence on memory. In t
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year (Dolcos et al., 2005). There a
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e suitable for investigating memory
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possible that having to distinguish
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of photographs of people, animals a
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Retrieval phase: Participants then
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y the ANOVA’s. These are only rep
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Table 2.1: Experiments 1 and 2: Res
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In these experiments the influence
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We found evidence of recognition me
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For the recognition test, which was
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Section 5. Experiments 2A and 2B: P
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items that had been seen previously
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Section 7. Experiment 2E: Recogniti
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Table 2.2. Experiment 2: Results of
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For the ‘know’ responses the ma
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Section 8. Experiment 2 - General D
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Presentation of stimuli in blocked
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It is possible that the act of maki
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enhancement can be influenced by re
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levels of memory between the positi
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the performance of any subsequent t
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experiment to provide a set of targ
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Experimental stimuli were presented
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Recognition performance in all thre
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Analysis of RKG responses We analys
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Further signal detection analysis o
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stimuli, which corresponded with mo
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could be generalised to the real-wo
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paradigm was first introduced by Tu
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The nature of recognition memory an
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The relation between Remember/Know/
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We proposed that a Remember respons
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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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Page 214 and 215: Section 3.1. Introduction Section 3
Page 216 and 217: were then shown, preceded by a 20 s
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Page 220 and 221: (negative, neutral, positive) and s
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Page 230 and 231: Section 3.3. Results Results of the
Page 232 and 233: Planned contrasts revealed the impa
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Page 238 and 239: Section 3.4. Discussion There was e
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Page 242 and 243: Table 5.7. Average ratings (standar
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Page 252 and 253: Section 5.3. Eye movement results T
Page 254 and 255: .01). Post-hoc Tukey’s HSD were u
Page 256 and 257: The number of fixations made on dif
Page 258 and 259: (F(1.79,5.37) = 7.12, MSe = 232535.
Page 260 and 261: emotional and neutral object [F(1,6
Page 264 and 265: may be that the scenes were easier
Page 266 and 267: Chapter 6. Discussion In the final
Page 268 and 269: In chapter 4 I extended the experim
Page 270 and 271: Figure 6.3 Summary of findings from
Page 272 and 273: alternative measures of attention h
Page 274 and 275: distribution of visual attention re
Page 276 and 277: designing and conducting experiment
Page 278 and 279: contributed to the difficulty in cr
Page 280 and 281: whether these perceptual difference
Page 282 and 283: Richardson-Klavehn, 2005) with the
Page 284 and 285: High Threshold Theory (Macmillan &
Page 286 and 287: participant and the artificial prod
Page 288 and 289: References Adolphs, R. (2002). Reco
Page 290 and 291: Buchanan, T. W. (2007). Retrieval o
Page 292 and 293: Davidson, R. J. (1994). On emotion,
Page 294 and 295: Gardiner, J. M., Ramponi, C., & Ric
Page 296 and 297: James, W. (1884). What is an emotio
Page 298 and 299: Levine, L. J., & Bluck, S. (2004).
Page 300 and 301: components. Journal of Experimental
Page 302 and 303: Rowe, G., Hirsh, J. B., & Anderson,
Page 304 and 305: Talmi, D., Schimmack, U., Paterson,
Page 306 and 307: Zajonc, R. B. (1968). Attitudinal e
Page 308 and 309: Appendix 2.2. ANOVA Analyses for Ex
Page 310 and 311: 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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