cognitive processes of avians and primates will be investigated in learning and memory experiments. Three programs of research investigate the strategies and processes of pigeon concept learning, learning basic to accurately performing list memory tasks. One program investigates configural pattern learning of integrating the components of the stimuli as opposed to learning relationships between components, another explores learning with real objects as opposed to object pictures, and a third examines a new procedure of using containers of gravel as stimuli with grain reinforcement buried beneath. Investigations of rhesus monkey list-memory processing focuses on interfering and enhancing effects of previously seen test items, and interference and time-dependent processes responsible for changes in the serial position effects and long-term and short-term memory at different retention intervals. Comparison experiments with human subjects will be conducted with kaleidoscope pattern stimuli.

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National Institute of Mental Health (NIMH)
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University of Texas Health Science Center Houston
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Wright, Anthony A; Delius, Juan D (2005) Learning processes in matching and oddity: the oddity preference effect and sample reinforcement. J Exp Psychol Anim Behav Process 31:425-32
Wright, Anthony A; Rivera, Jacquelyne J; Katz, Jeffrey S et al. (2003) Abstract-concept learning and list-memory processing by capuchin and rhesus monkeys. J Exp Psychol Anim Behav Process 29:184-98
Alvarado, Maria C; Wright, Anthony A; Bachevalier, Jocelyne (2002) Object and spatial relational memory in adult rhesus monkeys is impaired by neonatal lesions of the hippocampal formation but not the amygdaloid complex. Hippocampus 12:421-33
Wright, A A; Rivera, J J; Hulse, S H et al. (2000) Music perception and octave generalization in rhesus monkeys. J Exp Psychol Gen 129:291-307
Wright, A A (1999) Visual list memory in capuchin monkeys (Cebus apella). J Comp Psychol 113:74-80
Wright, A A (1999) Auditory list memory and interference processes in monkeys. J Exp Psychol Anim Behav Process 25:284-96
Wright, A A; Rivera, J J (1997) Memory of auditory lists by rhesus monkeys (Macaca mulatta). J Exp Psychol Anim Behav Process 23:441-9
Neiworth, J J; Wright, A A (1994) Monkeys (Macaca mulatta) learn category matching in a nonidentical same-different task. J Exp Psychol Anim Behav Process 20:429-35
Wright, A A (1992) Learning mechanisms in matching to sample. J Exp Psychol Anim Behav Process 18:67-79
Wright, A A; Cook, R G; Rivera, J J et al. (1990) Naming, rehearsal, and interstimulus interval effects in memory processing. J Exp Psychol Learn Mem Cogn 16:1043-59

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