||University of North Carolina-Chapel Hill, 1972
Assistant to Full Professor of Psychology (1972-present)
Assistant Chair of Psychology (1976-present)
Chair, Queens College Academic Senate (198-2002)
Director, Queens College Summer Session (2003-present)
Chair, Queens College IRB (2004-2007); First Vice Chair (2008-present)
Graduate School and University Center of the City University of New York
Member, Doctoral Faculty in Psychology (1976-present)
Program Head--Learning Processes Sub-Program in Psychology
Licensed Psychologist, State of New York: License Number 005978
Board Certified Behavior Analyst: Certificate Number 1-00-0020
Basic Research: Learning, conditioned reinforcement, visual and temporal perception
Applied Research in Behavior Analysis relating to autism, eating behavior, and teaching
Ryan, C. S., Hemmes, N. S., & Brown, B. L. (submitted). Effects of conditioning history on selective stimulus control by elements of compound discriminative stimuli. Submitted to Journal of the Experimental Analysis of Behavior, December, 2007.
Brown, B.L., Hemmes, N.S., Demotes-Mainard, J., Daheron, L., & Henry, C. (submitted) Temporal Judgment as a Function of Clinical Mood State in Bipolar Disorder. Submited to Journal of Affective Disorders, March, 2008.
Aum, S., Brown, B. L., & Hemmes, N. S. (2007). The Effect of Intruded Events on Peak Time: The Role of Reinforcement History during the Intruded Event. Behavioural Processes, 74 (2007) 187–197.
Hemmes, N.S, Brown, B.L.,& Kladopoulos, C.N. (2004). The psychophysics of time perception with and without a concurrent nontemporal task. Perception & Psychophysics, 66, 328-41.
Kladopoulos, C. N., Hemmes, N. S. & Brown, B. L. (2004). Prospective Timing under Dual-Task Paradigms: Attentional and Contextual-Change Mechanisms. Behavioural Processes, 67, 221-233.
Aum, S., Brown, B.B., & Hemmes, N. S. (2004). The effects of concurrent task and gap events on peak time in the peak procedure. Behavioural Processes, 65, 43-56.
Jakubow, J. J., Brown, B. L., & Hemmes, N. S. (2004). Cover cue duration relative to CS duration determined the cover stimulus effect. Psychological Record, 54, 293-317.
Ryan, C. S., Hemmes, N. S., & Brown, B. L. (2003). The Effect of Chromaticity on Object Identification Using Renaming and Recognition. Psychological Record, 53, 467-486.
Kladopoulos, C.N., Brown, B.L., Hemmes, N.S., and Cabeza de Vaca, S. (1998). The start-stop procedure: Reproduction of temporal intervals by human subjects. Perception & Psychophysics, 60, 438-450.
Hemmes, N.S., Brown, B.L., Jakubow, J.J., & Cabeza de Vaca, S. (1997). Determinants of response recovery in extinction following response elimination. Learning and Motivation, 28, 542-557.
Brown, B.L., Hemmes, N.S., & Cabeza de Vaca, S. (1997). Timing of the CS-US interval by pigeons in trace and delay autoshaping. The Quarterly Journal of Experimental Psychology, 50B, 40-53.
Cabeza de Vaca, S., Brown, B.L., & Hemmes, N.S. (1994). Internal clock and memory processes in animal timing. Journal of Experimental Psychology: Animal Behavior Processes, 20, 184-198.
Hemmes, N.S., Brown, B.L., & Cabeza de Vaca, S. (1994). Appetitive backward conditioning in pigeons. The Psychological Record, 44, 221-237.
Newman, B., Hemmes, N.S., Buffington, D.M., & Andreopoulos, S. (1994). The effects of schedules of reinforcement on instruction following in human subjects with verbal and nonverbal stimuli. Analysis of Verbal Behavior, 12, 31-41.
Brown, B.L., Hemmes, N.S., Cabeza de Vaca, S., & Pagano, C. (1993). Sign-and goal-tracking during delay and trace autoshaping in pigeons. Animal Learning and Behavior, 21, 360-368.
Newman, B., O'Grady, M.A., Ryan, C.S., & Hemmes, N.S. (1993). Pavlovian conditioning of the human response to tickle: Temporal and delay conditioning. Perceptual and Motor Skills, 77, 779-785.
Hassin-Herman, A., Hemmes, N. S., & Brown, B. L. (1992). Determinants of behavioral contrast: Pavlovian effects and anticipatory contrast. Journal of the Experimental Analysis of Behavior, 57, 159-175.
Brown, B.L., Hemmes, N.S., & Cabeza de Vaca, S. (1992). Effects of intratrial stimulus change on fixed-interval performance: The roles of clock and memory processes. Animal Learning and Behavior, 20, 83-93.
Newman, B., Buffington, D. M., & Hemmes, N. S. (1991). Maximization of reinforcement by two autistic students with accurate and inaccurate instructions. The Analysis of Verbal Behavior, 9, 41-48.
Hemmes, N.S., Brown, B.L. & Cabeza de Vaca, S. (1990). Effects of trial duration on overall and momentary rates of maintained autoshaped keypecking: Choice and single stimulus trials. Animal Learning and Behavior, 18, 171-178.
Ryan, C. S., Hemmes, N. S., Sturmey, P., Jacobs, J. D., & Grommet, E. K. (accepted for publication, February, 2007). Effects of a brief staff training procedure on instructors’ use of incidental teaching and students' frequency of initiation toward instructors. Research in Autism Spectrum Disorders.
Ryan, C. S., & Hemmes, N. S. (2005). Effects of the contingency for homework submission on the probability of homework submission and on quiz performance in a college course. Journal of Applied Behavior Analysis, 38, 79-88.
Ryan, C. S., & Hemmes, N. S. (2005). Post-training discrete-trial teaching performance by instructors of young children with autism in early intensive behavioral intervention. The Behavior Analyst Today, 6, 1-12.
Vintere, P., Hemmes, N.S., Brown, B.L., & Poulson, C.L. (2004). Self-instructions in gross-motor skill acquisition for preschool dance classes. Journal of Applied Behavior Analysis, 37, 305-322.
McDonald, M. E., & Hemmes, N. S. (2003). Increases in social initiation toward an adolescent with autism: Reciprocity effects. Research in Developmental Disabilities, 24, 453-465.
Reinecke, D.R., Newman, B., Kurtz, A.L., Ryan, C.S., & Hemmes, N.S. (1997). Teaching deception skills in a game-play context to three autistic adolescents. Journal of Autism and Developmental Disorders, 27, 127-137.
Newman, B., Buffington, D.M., Hemmes, N.S. (1996). Self-reinforcement used to increase the appropriate conversation of autistic teenagers. Education and Training in Mental Retardation and Developmental Disabilities, 31, 304-309.
Newman, B., Buffington, D.M., Hemmes, N.S., & Rosen, D. (1996). Answering objections to self-management and related concepts. Behavior and Social Issues, 6, 85-95.
Kaplan, H., Hemmes, N.S., Motz, P., & Rodriguez, H. (1996).
Self-reinforcement and persons with developmental disabilities. The Psychological Record, 46, 161-178.
Newman, B., Buffington, D.M., O'Grady, M.A., McDonald, M.E., Poulson, C.L., & Hemmes, N.S. (1995). Self-management of schedule-following in three teenagers with autism. Behavioral Disorders, 20, 195-201.
Newman, B., Buffington, D.M., & Hemmes, N.S. (1995). The effects of schedules of reinforcement on instruction following. The Psychological Record, 45, 463-476.