Jeff Haddad

Research Interests:

The research in the motor development lab attempts to understand the development of posture and reaching in children. Specifically, we attempt to examine how factors such as motor learning, the environment, cognitive development and physical growth influences the interaction between the postural system and manual control systems.

The equipment in the motor development laboratory includes a three-dimensional image analysis system (Six Camera Vicon system) that allows us to track the subject's movement in three-dimensional space and a force place (AMTI) for measuring postural movements of the children.


  • PhD in Kinesiology from University of Massachusetts at Amherst
  • MS in Kinesiology from University of Massachusetts at Amherst
  • BS in Kinesiology from University of Massachusetts at Amherst

Selected Publications:

  • Kim, H., Cai, F., Ryu, J.H ., Haddad, J.M., & Zelaznik*, H.N. (in press).  Tennis match time series do not exhibit long term correlations.  International Journal of Sport Psychology.
  • O’Brien, K.M., Zhang, J., Walley, P.R., Rhoads, J.F., Haddad, J.M., & Claxton*, L.J. (in press). A Model to Investigate the Mechanisms Underlying the Emergence and Development of Independent Sitting. Developmental Science.
  • Muir, B.C., Rietdyk, S*, & Haddad, J.M. (2014). Gait initiation: the first four steps in young adults, adults aged 65-79 years, and adults aged 80-91 years.  Gait & Posture, 39, 490-494.
  • Chagdes, J.C.*, Rietdyk, S., Haddad, J.M., Zelaznik, H.N., & Raman, A.* (2013). Nonlinear dynamics of human postural stability on balance boards.  Journal of Biomechanics, in press.
  • Claxton, L.J.*, Haddad, J.M., Ponto, K., Ryu, J.H., & Newcomer, S.C. (2013). Newly standing infants increase postural stability when performing a supra-postural task. PLoS ONE 8(8), e71288.
  • Haddad, J.M.*Claxton, L.J., Melzer, D.K., Hamill, J., & Van Emmerik, R. (2013).  Developmental changes in postural stability during the performance of a precision manual task. Journal of Motor Learning and Development, 112-19.
  • Haddad, J.M., Rietdyk, S., Claxton, L.J., & Huber, J.E. (2013).  Task dependent postural control throughout the lifespan. Exercise and Sport Sciences Reviews, 41(2), 123-132.
  • Claxton*, L. J., Melzer, D., Ryu, J. H., & Haddad, J. M. (2012). The control of posture is newly standing infants is task dependent. Journal of Experimental Child Psychology, 113, 159-165.
  • Haddad*, J. M., Rietdyk*, S., & Claxton*, L. J. (2012). Exercise training to improve independence and quality of life in impaired individuals: A commentary on Li and Hondzinski’s “Reversal of movement dysfunction due to peripheral neuropathy with exercise modalities”. Exercise and Sports Science Reviews, 40, 117.
  • Haddad*, J. M., Claxton, L. J., Keen, R., Berthier, N. E., Riccio, G. E., Hamill, J., & Van Emmerik, R. E. A. (2012). Development of the coordination between posture and manual control. Journal of Experimental Child Psychology, 111, 286-298.
  • Wheat*, J. S., Haddad, J. M., & Scaife, R. (2012). Between-day reliability of time-to-contact measures used to assess postural stability.  Gait & Posture, 35, 345-347.
  • Haddad*, J. M., Rietdyk, S., Ryu, J. H., Seaman, J. M., Silver, T. A., Kalish, J. A., & Hughes, C. M. L. (2011).  Postural asymmetries in response to holding evenly and unevenly distributed loads during self-selected stance.  Journal of Motor Behavior, 43, 345-355.
  • Hughes*, C. M. L.,Haddad, J. M., Franz, E. A., Zelaznik, H. N., & Ryu, J. H. (2011). Physically coupling objects in a bimanual task alters kinematics but not end-state comfort. Experimental Brain Research, 211, 219-229.
  • Rhea*, C. K., Silver, T. A., Hong, S. L., Ryu, J. H., Studenka, B. E., Hughes, C. M. L., &Haddad*, J. M. (2011). Noise and complexity in human postural control:  Interpreting the different estimations of entropy, PLoS One, 6, e17696, 1-9.
  • Haddad*, J. M., Chen, Y., & Keen, R. (2011). Preschoolers search for hidden objects, Journal of Experimental Child Psychology, 109, 123-131.
  • Haddad*, J. M., Ryu, J. H., Seaman, J. M. & Ponto, K. (2010). Time-to-contact measures capture modulations in posture that occur due to the precision demands of a manual task, Gait & Posture, 32, 592-596.
  • Rhea*, C. K., Rietdyk, S., & Haddad, J. M. (2010). Locomotor adaptation versus perception adaptation when stepping over an obstacle with a height Illusion. PLoS One, 5, e11544, 1-4.
  • Haddad*, J. M., van Emmerik, R. E. A., Wheat, J. S., Hamill, J., & Snapp-Childs, W. (2010). The use of continuous relative phase to assess dynamic gait symmetry.  Journal of Applied Biomechanics, 26, 109-113.
  • Chagdes*, J., Rietdyk, S., Haddad, J. M., Zelaznik, H. N., Raman, A., Rhea, C. K., & Silver, T. A. (2009). Multiple timescales in postural dynamics associated with vision and a secondary task are revealed by wavelet analysis.  Experimental Brain Research, 197, 297-310.
  • Haddad*, J. M., Van Emmerik, R. E. A., Wheat, J., & Hamill, J. (2008). Developmental changes in the dynamical structure of postural sway during a precision fitting task. Experimental Brain Research, 190, 431-441.
  • Hasson*, C. J., Van Emmerik, R. E. A., Caldwell, G. E., & Haddad, J. M., Gagnon, J. & Hamill, J. (2008). The Influence of embedding parameters and noise in center of pressure recurrence quantification analysis. Gait & Posture, 27, 416-422. 
  • Haddad*, J. M., Kloos, H., & Keen, R. (2008). Conflicting cues in a dynamic search task are reflected in children’s eye movements and search errors. Developmental Science, 11, 504-515.
  • Morgante*, J. D., Haddad, J. M. & Keen, R. (2008). Preschoolers’ oculomotor behavior during their observation of an action task. Visual Cognition, 16, 430-438.
  • Haddad*, J. M., Gagnon, J., Hasson, C. J., van Emmerik, R. E. A., & Hamill, J. (2006).  Evaluation of time-to-contact measures for assessing postural stability. Journal of Applied Biomechanics, 22, 155-161.
  • Haddad*, J. M., Van Emmerik, R. E. A., Whittlesey, S. N., & Hamill, J.  (2006). Adaptations in interlimb and intralimb coordination to asymmetrical loading in human walking.  Gait & Posture, 23, 429-434.
  • Kloos*, H., Haddad, J. M., & Keen, R. (2006).  Which cues are available to 24-month-olds? Evidence from point-of-gaze measures during search.  Infant Behavior & Development, 29, 243-250.
  • Seay*, J., Haddad, J. M., van Emmerik, R. E. A., & Hamill, J. (2006).  Coordination variability around the walk to run transition during human locomotion, Motor Control, 10, 178-196.
  • Li*, L., Haddad, J. M., & Hamill, J.  (2005). Stability and variability may respond differently to changes in walking speed.  Human Movement Science, 24, 257-267. 
  • Van Emmerik*, R. E. A., McDermott, W. M., Van Wegen, E. E. H. & Haddad, J. M.  (2005). Age-related changes in upper body adaptation to walking speed in human locomotion. Gait & Posture, 22, 233-239.
  • Peters*, B. T., Haddad, J. M., Heiderscheit, B. C., Van Emmerik,  R. E. A., & Hamill, J.  (2003). Limitations in the use and interpretation of continuous relative phase.  Journal of Biomechanics, 36, 271-274.
  • Hamill*, J., Haddad, J. M., & McDermott, W. M.  (2000). Issues in quantifying variability from a dynamical systems perspective.  Journal of Applied Biomechanics, 16, 407-419.

Jeff Haddad

Associate Professor

Lambert, Room 201A
Phone: (765) 496-9489
Fax: (765) 496-1239

The Motor Behavior Group

Center on Aging and Life Course

Health & Kinesiology, 800 W. Stadium Ave., West Lafayette, IN 47907, PH:(765) 494-3170, Fax: (765) 496-1239

2016 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Health & Kinesiology

If you have trouble accessing this page because of a disability, please contact Purdue Marketing and Media at