Prejudice is generally thought to derive from learned, emotion-laden experiences. The mechanisms underlying the formation of prejudice over time, however, remain unknown. In the present research, we proposed and tested hypotheses regarding prejudice formation derived from research on memory consolidation and social perception. We hypothesized that time-dependent memory consolidation would produce better implicit memory for negative out-group information and positive in-group information, compared with negative in-group information and positive out-group information. Fifty undergraduates learned positive and negative information about racial in-group (Latino) and out-group (African American) targets. Participants returned after both a short time delay (2–6 hr after the learning session) and a long time delay (48 hr after the learning session) to complete a lexical decision task. Results demonstrated that participants responded to information consistent with an in-group bias faster after a long time delay than after a short time delay. Our findings have important implications for the study of social perception and memory consolidation.
AllportG. W. (1954). The nature of prejudice. Oxford, England: Addison-Wesley.
2.
AmodioD. M.DevineP. G. (2006). Stereotyping and evaluation in implicit race bias: Evidence for independent constructs and unique effects on behavior. Journal of Personality and Social Psychology, 91, 652–661. doi:0.1037/0022-3514.91.4.652
3.
AmodioD. M.FrithC. D. (2006). Meeting of minds: The medial frontal cortex and social cognition. Nature Reviews Neuroscience, 7, 268–277. doi:10.1038/nrn1884
4.
Arms-ChavezC.EngeL. R.LupoA. K.RiveraL. O.ZárateM. A. (2014). The formation of person memories over time. Unpublished manuscript.
5.
CarlstonD. E.SkowronskiJ. J. (1994). Savings in the relearning of trait information as evidence of spontaneous inference generation. Journal of Personality and Social Psychology, 66, 840–856. doi:10.1037/0022-3514.66.5.840
6.
ChoiH.KensingerE. A.RajaramS. (2013). Emotional content enhances true but not false memory for categorized stimuli. Memory & Cognition, 41, 403–415. doi:10.3758/s13421-012-0269-2
7.
CottrellC. A.NeubergS. L. (2005). Different emotional reactions to different groups: A sociofunctional threat-based approach to “prejudice.”Journal of Personality and Social Psychology, 88, 770–789. doi:10.1037/0022-3514.88.5.770
8.
DasguptaN.DeStenoD.WilliamsL. A.HunsingerM. (2009). Fanning the flames of prejudice: The influence of specific incidental emotions on implicit prejudice. Emotion, 9, 585–591. doi:10.1037/a0015961
9.
FazioR. H.JacksonJ. R.DuntonB. C.WilliamsC. J. (1995). Variability in automatic activation as an unobtrusive measure of racial attitudes: A bona fide pipeline?Journal of Personality and Social Psychology, 69, 1013–1027.
10.
GreenwaldA. G.McGheeD. E.SchwartzJ. L. K. (1998). Measuring individual differences in implicit cognition: The Implicit Association Test. Journal of Personality and Social Psychology, 74, 1464–1480. doi:10.1037/0022-3514.74.6.1464
11.
GrochS.WilhelmI.DiekelmannS.SaykF.GaisS.BornJ. (2011). Contribution of norepinephrine to emotional memory consolidation during sleep. Psychoneuroendocrinology, 36, 1342–1350. doi:10.1016/j.psyneuen.2011.03.006
12.
HuP.Stylos-AllanM.WalkerM. P. (2006). Sleep facilitates consolidation of emotional declarative memory. Psychological Science, 17, 891–898. doi:10.1111/j.1467-9280.2006.01799.x
13.
HugenbergK.BodenhausenG. V. (2004). Ambiguity in social categorization: The role of prejudice and facial affect in race categorization. Psychological Science, 15, 342–345.
14.
KundaZ.DaviesP. G.AdamsB. D.SpencerS. J. (2002). The dynamic time course of stereotype activation: Activation, dissipation, and resurrection. Journal of Personality and Social Psychology, 82, 283–299. doi:10/1037//0022-3514.82.3.283
15.
LewisP. A.DurrantS. J. (2011). Overlapping memory replay during sleep builds cognitive schemata. Trends in Cognitive Sciences, 15, 343–351. doi:10.1016/j.tics.2011.06.004
16.
McClellandJ. L.McNaughtonB. L.O’ReillyR. C. (1995). Why there are complementary learning systems in the hippocampus and neocortex: Insights from the successes and failures of connectionist models of learning and memory. Psychological Review, 102, 419–457. doi:10.1037/0033-295X.102.3.419
17.
McCloskeyM.CohenN. J. (1989). Catastrophic interference in connectionist networks: The sequential learning problem. In BowerG. H. (Ed.), The psychology of learning and motivation (Vol. 24, pp. 109–164). San Diego, CA: Academic Press.
18.
McGaughJ. L. (2004). The amygdala modulates the consolidation of memories of emotionally arousing experiences. Annual Review of Neuroscience, 27, 1–28. doi:10.1146/annurev.neuro.27.070203.144157
19.
NewheiserA. K.DovidioJ. F. (2012). Individual differences and intergroup bias: Divergent dynamics associated with prejudice and stereotyping. Personality and Individual Differences, 53, 40–74. doi:10.1016/j.paid.2012.02.024
20.
O’ReillyR. C.NormanK. A. (2002). Hippocampal and neocortical contributions to memory: Advances in the complementary learning systems framework. Trends in Cognitive Sciences, 6, 505–510. doi:10.1016/S1364-6613(02)02005-3
21.
PayneJ. D.KensingerE. A. (2010). Sleep’s role in the consolidation of emotional episodic memories. Current Directions in Psychological Science, 19, 290–295. doi:10.1177/0963721410383978
22.
PayneJ. D.KensingerE. A. (2011). Sleep leads to changes in the emotional memory trace: Evidence from fMRI. Journal of Cognitive Neuroscience, 23, 1285–1297. doi:10.1162/jocn.2010.21526
23.
PayneJ. D.SchacterD. L.PropperR. E.HuangL.WamsleyE. J.TuckerM. A.. . . StickgoldR. (2009). The role of sleep in false memory formation. Neurobiology of Learning and Memory, 92, 327–334. doi:10.1016/j.nlm.2009.03.007
24.
PayneJ. D.StickgoldR.SwanbergK.KensingerE. A. (2008). Sleep preferentially enhances memory for emotional components of scenes. Psychological Science, 19, 781–788.
25.
RatcliffR. (1993). Methods for dealing with reaction time outliers. Psychological Bulletin, 114, 510–532. doi:10.1037/0033-2909.114.3.510
26.
SAS Institute. (1989). SAS/STAT user’s guide. Cary, NC: Author.
27.
StickgoldR.WalkerM. P. (2013). Sleep dependent memory triage: Evolving generalization through selective processing. Nature Reviews Neuroscience, 16, 139–145. doi:10.1038/nn.3303
28.
StrepenichV.AlbouyG.DarsaudA.SchmidtC.VandewalleG.Dang-VuT. T.. . . MaquetP. (2009). Sleep promotes the neural reorganization of remote emotional memory. The Journal of Neuroscience, 29, 5143–5152. doi:10.1523/JNEUROSCI.0561-09.2009
29.
TajfelH.TurnerJ. C. (1986). The social identity theory of intergroup behavior. In WorchelS.AustinW. G. (Eds.), Psychology of intergroup relations (pp. 7–24). Chicago, IL: Nelson Hall.
30.
VeroskyS. C.TodorovA. (2010). Generalization of affective learning about faces to perceptually similar faces. Psychological Science, 21, 779–785. doi:10.1177/0956797610371965
31.
VeroskyS. C.TodorovA. (2013). When physical similarity matters: Mechanisms underlying affective learning generalization to the evaluation of novel faces. Journal of Experimental Social Psychology, 49, 661–669. doi:10.1016/j.jesp.2013.02.004
32.
WalkerM. P.van der HelmE. (2009). Overnight therapy? The role of sleep in emotional brain processing. Psychological Bulletin, 135, 731–748. doi:10.1037/a0016570
33.
ZárateM. A.EngeL. R. (2013). The role of memory consolidation during sleep in social perception and stereotyping. In DerksB.ScheepersD.EllemersN. (Eds.), Neuroscience of prejudice and intergroup relations (pp. 130–145). New York, NY: Psychology Press.
34.
ZárateM. A.StoeverC. J.MaclinK. M.Arms-ChavezC. (2008). Neurocognitive underpinnings of face perception: Further evidence of distinct person and group perception processes. Journal of Personality and Social Psychology, 94, 108–115. doi:10.1037/0022-3514.94.1.108
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