This article presents a neural network simulation of the out-grouphomogeneity effect (OHE). The model is a feedback network with delta-rule learning that has been previouslv used to simulate other aspects of stereotype learning, as well as causal learning and reasoning, and human memory. This simulation achieves 2 goals: First, we show that the model could successfully simulate the OHE. We argue that this is due to the error-correcting nature of delta-rule learning. Second. we show that each of aspects of the simulation influences the size of the OHE: (a) the ratio of in-group to out-group size, (b) the overall population size, (c) the learning rate, (d) the decay rate for weights, and (e) increased learning for extreme cases. The psychological relevance of these parameters and ways to study them are presented. Advantages of the model in terms of breadth of coverage for studying social cognitive phenomena are discussed.
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References
1.
Bechtel, W., & Abrahamsen, A. (1991). Connectionism and the mind: An introductionl to parallel processing in netnork. Cambridge, MA: Basil Blackwell.
2.
Demuth, H., & Beale, M. (1994). Neural Netnoark Toolbox user's guide. Natick, MA: Math Works.
3.
Fiedler, K. (1996). Explaining and simulating judgment biases as an aggregation phenomenon in probabilistic, multiple-cue environments. Psychological Review, 103, 193-214.
4.
Fiedler, K., Kemmelmeier, M., & Freytag, P. (1999).Explaining asymmetric intergroup judgments through differential aggregation: Computer simulations and some new evidence. In W. Stroebe & M. Hewstone (Eds.), European review of social psychology (Vol. 10. pp. 1-40). New York: Wiley.
5.
Garcia, J., & Garcia y Robertson, R. (1985). Evolution of learning mechanisms. In B. L. Hammonds (Ed.), Psychology and learning (pp. 191-243). Washington, DC: American Psychological Association.
6.
Garcia, J., & Koelling, R. A. (1966). Relation of cue to consequence in avoidance learning. Psychonomic Science, 4, 123-124.
7.
Garcia, J., Lasiter, P. S., Bermudez-Rattoni, F., & Deems, D. A. (1985). A general theory of aversion learning. Annals of the New York Academy of Sciences, 443, 8-21.
8.
Gluck, M. H., & Bower, G. H. (1988a). Evaluating an adaptive network model of human learning. Journal of Memory and Language, 27, 166-195.
9.
Gluck, M. H., & Bower, G. H. (1988b). From conditioning to category learning: An adaptive network model. Journal of Experimental Psychology: General, 117, 227-247.
10.
Hintzman, D. L. (1986). “Schema abstraction” in a multiple-trace memory model. Psychological Review, 93, 528-551.
11.
Hintzman, D. L. (1988). Judgments of frequency and recognition memory in a multiple-trace memory model. Psychological Review93, 411-428.
12.
Judd, C. M., Ryan, C. S., & Park, B. (1991). Accuracy in the judgment of in-group and out-group variability. Journal of Personality and Social Psychology, 61, 366-379.
13.
Kashima, Y., Woolcock, J., & Kashima, E. S. (2000). Group impressions as dynamic configurations: The tensor product model of group impression formation and change. Psychological Review, 107, 914-942.
14.
Kraus, S., Ryan, C. S., Judd, C. M., Hastie, R., & Park, B. (1993). Use of mental frequency distributions to represent variability among members of social categories. Social Cognition, 11, 22-43.
15.
Kruschke, J. K. (1992). ALCOVE: An exemplar-based connectionist model of category learning. Psychological Review, 99, 22-44.
16.
Kunda, Z., & Thagard, P. (1996). Forming impressions from stereo-types, traits, and behaviors: A parallel constraint satisfaction theory. Psychological Review, 103, 284-308.
17.
Linville, P. W., & Fischer, G. W. (1993). Exemplar and abstraction models of perceived group variability and stereotypicality. Social Cognition, 11, 92-125.
18.
Linville, P. W., Fischer, G. W., & Salovey, P. (1989). Perceived distributions of the characteristics of in-group and out-group members: Empirical evidence and a computer simulation. Journal of Personality and Social Psychology, 57, 165-188.
19.
Linville, P. W., Salovey, P., & Fischer, G. (1986).Stereotyping and perceived distributions of social characteristics: An application to ingroup-outgroup perception. In J. F. Dovidio & S. L. Gaertner (Eds.), Prejudice, discrimination, and racism (pp. 165-208). San Diego, CA: Academic.
20.
McClelland, J. L., & Rumelhart, D. E. (1981). An interactive activation model of context effects in letter perception: Part 1. An account of basic findings. Psychological Review, 88, 375-407.
21.
McClelland, J. L., & Rumelhart, D. E. (1986). A distributed model of human learning and memory. In J. L. McClelland, D. E. Rumelhart, & the PDP Research Group (Eds.), Parallel distributed processing: Explorations in the microstructure of cognition: Vol. 2. Psychological and biological models (pp. 170-215). Cambridge, MA: MIT Press.
22.
McClelland, J. L., Rumelhart, D. E., & the PDP Research Group. (1986). Parallel distributed processing: Explorations in the microstructure of cognition. Vol. 2. Psychological and biological models. Cambridge, MA: MIT Press.
23.
Montoya, J. A., & Read, S. J. (1998). A constraint satisfaction model of the correspondence bias: The role of accessibility and applicability of explanations. In M. A. Gernsbacher & S. J. Derry (Eds.), Proceedings of the Annual Conference of the Cognitive Science Society, 20, 722-727.
24.
Mullen, B., & Hu, L. (1989). Perceptions of ingroup and outgroup variability: A meta-analytic integration. Basic and Applied Social Psychology, 10, 233-252.
25.
Nisbett, R. E., & Kunda, Z. (1985). Perceptions of social distributions. Journal of Personality and Social Psychology, 48, 297-311.
26.
Nowak, A., & Vallacher, R. R. (1998a). Dynamical social psychology. New York: Guilford.
27.
Nowak, A., & Vallacher, R. R. (1998b). Toward computational social psychology: Cellular automata and neural network models of interpersonal dynamics. In S. J. Read & L. C. Miller (Eds.), Connectionist models of social reasoning and social behavior (pp. 277-311). Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
28.
Ostrom, T. M., & Sedikides, C. (1992). Outgroup homogeneity effects in natural and minimal groups. Psychological Bulletin, 112, 536-552.
29.
Park, B., & Judd, C. M. (1990). Measures and models of perceived group variability. Journal of Personality and Social Psychology, 59, 173-191.
30.
Park, B., Judd, C. M., & Ryan, C. S. (1991). Social categorization and the representation of variability information. In W. Stroebe & M. Hewstone (Eds.), European review of social psychology (Vol. 2, pp. 211-245). Chichester, England: Wiley.
31.
Park, B., & Rothbart, M. (1982). Perception of out-group homogeneity and levels of social categorization: Memory for the subordinate attributes of in-group and out-group members. Journal of Personality and Social Psychology, 42, 1051-1068.
32.
Park, B., Ryan, C. S., & Judd, C. M. (1992). Role of meaningful subgroups in explaining differences in perceived variability for in-groups and out-groups. Journal of Personality cnd Social Psychology, 63, 553-567.
33.
Plaut, D. C., McClelland, J. L., Seidenberg, M. S., & Patterson, K. (1996). Understanding normal and impaired word reading. Psychological Review, 103, 56-115.
34.
Queller, S. (2002). Stereotype change in a recurrent network.Personality and Social Psychology Review, 6, 295-303.
35.
Queller, S., & Smith, E. R. (2002). Subtyping versus bookkeeping in stereotype learning and change: Connectionist simulations and empirical findings. Journal of Personality and Social Psychology, 82, 300-313.
36.
Read, S. J. (2001). A feedback neural network model of causal learning and causal reasoning. Unpublished manuscript, University of Southern California, Los Angeles.
37.
Read, S. J., & Miller, L. C. (1993). Rapist or “regular guy”: Explanatory coherence in the construction of mental models of others. Personality and Social Psychology Bulletin, 19, 526-540.
38.
Read, S. J., & Miller, L. C. (1994). Dissonance and balance in belief systems: The promise of parallel constraint satisfaction processes and connectionist modeling approaches. In R. C. Schank & E. J. Langer (Eds.), Beliefs, reasoning. cand decision making: Psycho-logic in honor of Bob Abelson (pp. 209-235). Hillsdale, NJ: Lawrence Erlbaum Associates, Inc.
39.
Read, S. J., & Miller, L. C. (1998). On the dynamic construction of meaning: An interactive activation and competition model of social perception. In S. J. Read & L. C. Miller (Eds.), Connectionist models of social reasoning and behavior (pp. 27-68). Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
40.
Read, S. J., & Miller, L. C. (2002). Virtual personalities: A neural network model of personality. PersonalitY cand Social Psychology Review, 6, 357-369.
41.
Read. S. J., & Montoya, J. A. (1999a). An autoassociative model of causal learning and causal reasoning. Journal of Personality and Social Psychology, 76, 728-742.
42.
Read, S. J., & Montoya, J. A. (1999b). A feedback neural network model of causal learning and causal reasoning. In M. Hahn & S.C. Staness (Eds.), Proceedings of the Annual Conference of the Cognitive Science Society, 21, 578-583.
43.
Rescorla. R. A., & Wagner. A. R. (1972). A theory of Pavlovian conditioning: Variations in the effectiveness of reinforcement and non-reinforcement. In A. H. Black & W. F. Prokasy (Eds.), Classical conditioning II: Current research and theory (pp. 64-99). New York: Appleton-Century-Crofts.
44.
Rothbart, M., Fulero, S., Jensen, C., Howard, J., & Birrell, P. (1978). From individual to group impressions: Availability heuristics in stereotype formation. Journal of Experimental Social Psychology, 14, 237-255.
45.
Rumelhart, D. E., & McClelland, J. L. (1982). An interactive activation model of context effects in letter perception: Part 2. The contextual enhancement effect and some tests and extensions of the model. Psychological Review, 89, 60-94.
46.
Rumelhart, D. E., McClelland, J. L., & the PDP Research Group. (1986). Parallel distributed processing: Explorations in the microstructure of cognition: Vol. 1. Foundations. Cambridge, MA: MIT Press/Bradford.
47.
Shanks, D. R. (1991). Categorization by a connectionist network.Journal of Experimental Psychology: Learning, Memory, and Cognition,. 17, 433-443.
48.
Shanks, D. R., Holyoak, K. J., & Medin, D. L. (1996). Causal learning. San Diego, CA: Academic.
49.
Shoda, Y., Tiernan, S. L., & Mischel, W. (2002). Personality as a dynamical system: Emergence of stability and constancy from intra and interpersonal interactions. Personality and Social Psychology Review, 6, 316-323.
50.
Shultz, T. R., & Lepper, M. R. (1996). Cognitive dissonance reduction as constraint satisfaction. Psychological Review, 103, 219-240.
51.
Shultz, T. R., & Lepper, M. R. (1998). The consonance model of dissonance reduction. In S. J. Read & L. C. Miller (Eds.), Connectionist models of social reasoning and social behavior (pp. 211-244). Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
52.
Smith, E. R., & DeCoster, J. (1998a). Knowledge acquisition, accessibility, and use in person perception and stereotyping: Simulation with a recurrent connectionist network. Journal of Personality and Social Psychology, 74, 21-35.
53.
Smith, E. R., & DeCoster, J. (1998b). Person perception and stereotyping: Simulation using distributed representations in a recurrent connectionist network. In S. J. Read & L. C. Miller (Eds.), Connectionist models of social reasoning and social behavior. (pp. 111-140). Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
54.
Smith, E. R., & Zarate, M. A. (1992). Exemplar-based model of social judgment. Psychological Review, 99, 3-21.
55.
Tajfel, H. (1978). Differentiation between social groups. San Diego, CA: Academic.
56.
Van Overwalle, F., & Van Rooy, D. (1998). A connectionist approach to causal attribution. In S. J. Read & L. C. Miller (Eds.), Connectinalist models of Social reasoning and Social behavior, (pp. 143-171). Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
57.
Walker, N., & Jones, P. (1983). Encoding processes and the recall of text. Memory & Cognitiuo, 11, 275-282.
58.
Widrow. G., & Hoff, M. E. (1960). Adaptive switching circuits. In Institute of Radio Engineers, Western Electronic Show and Convention, Convention Record: Part 4 (pp. 96-104).
