title: Measuring information processing in a client with extreme agitation following traumatic brain injury using the Perceive, Recall, Plan and Perform System of Task Analysis.
abstract: OBJECTIVE
  Agitation following traumatic brain injury is characterised by a heightened state of activity with disorganised information processing that interferes with learning and achieving functional goals. This study aimed to identify information processing problems during task performance of a severely agitated adult using the Perceive, Recall, Plan and Perform (PRPP) System of Task Analysis. Second, this study aimed to examine the sensitivity of the PRPP System to changes in task performance over a short period of rehabilitation, and third, to evaluate the guidance provided by the PRPP in directing intervention.
  
  
  METHODS
  A case study research design was employed. The PRPP System of Task Analysis was used to assess changes in task embedded information processing capacity during occupational therapy intervention with a severely agitated adult in a rehabilitation context. Performance is assessed on three selected tasks over a one-month period.
  
  
  RESULTS
  Information processing difficulties during task performance can be clearly identified when observing a severely agitated adult following a traumatic brain injury. Processing skills involving attention, sensory processing and planning were most affected at this stage of rehabilitation. These processing difficulties are linked to established descriptions of agitated behaviour. Fluctuations in performance across three tasks of differing processing complexity were evident, leading to hypothesised relationships between task complexity, environment and novelty with information processing errors. Changes in specific information processing capacity over time were evident based on repeated measures using the PRPP System of Task Analysis. This lends preliminary support for its utility as an outcome measure, and raises hypotheses about the type of therapy required to enhance information processing in people with severe agitation.
  
  
  CONCLUSIONS
  The PRPP System is sensitive to information processing changes in severely agitated adults when used to reassess performance over short intervals and can provide direct guidance to occupational therapy intervention to improve task embedded information processing by categorising errors under four stages of an information processing model: Perceive, Recall, Plan and Perform.
authors.affiliation: Occupational Therapy, Faculty of Health Sciences, The University of Sydney, Sydney, New South Wales, Australia. mnot2529@mail.usyd.edu.au
authors.forename: Melissa T
authors.initials: MT
authors.lastname: Nott
authors.forename: Christine
authors.initials: C
authors.lastname: Chapparo
mesh_terms: D000328:Adult; D001930:Brain Injuries / Q000150:complications / Q000534:rehabilitation*; D003072:Cognition Disorders / Q000209:etiology / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D009517:New South Wales; D009788:Occupational Therapy / Q000379:methods*; D011595:Psychomotor Agitation / Q000209:etiology / Q000534:rehabilitation*; D015203:Reproducibility of Results; D013647:Task Performance and Analysis; D015599:Trauma Severity Indices; D055815:Young Adult