title: Simultaneous bilateral hand strength testing in a client population, Part II: Relationship to a distraction-based lifting evaluation.
abstract: OBJECTIVE
  To determine if passing or failing statistically-based validity criteria during a distraction-based hand strength assessment is related to test behavior during a lifting assessment.
  
  
  METHODS
  200 consecutive clients presenting for an FCE.
  
  
  METHODS
  The two testing protocols, one involving a hand strength assessment, the other involving an assessment of lifting capacities, were administered to assess the variability between repeated measures.
  
  
  RESULTS
  Clients failing two or more statistically-based hand strength validity criteria had significantly more variability between repeated measures in the lifting assessment, p=0.001 and 0.014 for right and left unilateral lifts, respectively, and p<0.0005 for three different bilateral lifts.
  
  
  CONCLUSIONS
  A pattern of performance related to the degree of variability in repeated measures protocols for these two distraction-based protocols is revealed. Passing or failing the hand strength assessment are each equally predictive of test outcome during the distraction-based lifting assessment. The failure of the validity criteria in these two distraction-based tests cannot be attributed to a history of surgery but, rather, is the result of abnormal test behavior.
authors.affiliation: Millikin University, Decatur, IL, USA.
authors.forename: James D
authors.initials: JD
authors.lastname: St James
authors.forename: Darrell W
authors.initials: DW
authors.lastname: Schapmire
authors.forename: Larry
authors.initials: L
authors.lastname: Feeler
authors.forename: Joe
authors.initials: J
authors.lastname: Kleinkort
mesh_terms: D000293:Adolescent; D000328:Adult; D001519:Behavior; D005260:Female; D018737:Hand Strength; D006801:Humans; D017770:Lifting; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D015203:Reproducibility of Results; D014938:Work Capacity Evaluation; D055815:Young Adult