Description

The Motor Activity Log (MAL) is a standardized, interview-based clinical assessment instrument developed to evaluate the functional use of the affected upper extremity during activities of daily living in individuals who have experienced stroke or other neurological disorders resulting in upper-limb motor impairment. Rather than measuring motor capacity under laboratory conditions, the MAL focuses on how frequently and how well patients actually use their affected arm and hand in their everyday environment. Consequently, it has become one of the most widely used outcome measures in neurorehabilitation, particularly for evaluating the effectiveness of interventions such as Constraint-Induced Movement Therapy (CIMT) and other upper-limb rehabilitation programs.

The MAL evaluates several important aspects of upper-limb performance, including:

  • Amount of Use (AOU) – the frequency with which the affected upper limb is used during everyday activities.
  • Quality of Movement (QOM) – the quality, smoothness, coordination, and effectiveness of movements performed with the affected limb.
  • Functional Independence – the individual’s ability to perform routine daily activities using the impaired arm and hand.
  • Real-World Motor Performance – actual use of the upper limb outside the clinical setting.
  • Recovery Following Neurological Injury – changes in functional arm use throughout rehabilitation.

The MAL is based on the concept that successful rehabilitation should improve not only motor ability but also the spontaneous integration of the affected limb into everyday life, thereby reducing the phenomenon of learned non-use commonly observed after stroke.

Analysis and Use of Data

The MAL enables clinicians and researchers to quantify functional upper-limb use and monitor recovery following neurological injury. It provides valuable outcome measures for rehabilitation research and clinical practice.

Statistical analyses commonly include:

  • Descriptive statistics (means, standard deviations, medians, and percentile distributions).
  • Reliability assessment using Cronbach’s alpha and McDonald’s Omega.
  • Test–retest reliability and inter-rater reliability analyses.
  • Construct validity evaluation through Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).
  • Assessment of convergent and discriminant validity using measures such as the Fugl-Meyer Assessment (FMA), Action Research Arm Test (ARAT), Wolf Motor Function Test (WMFT), Box and Block Test, and other upper-extremity functional assessments.
  • Correlation analyses using Pearson’s or Spearman’s correlation coefficients.
  • Group comparisons using independent-samples t-tests, ANOVA, MANOVA, or appropriate non-parametric procedures.
  • Multiple regression analyses to identify predictors of upper-limb functional recovery.
  • Longitudinal analyses evaluating treatment outcomes following rehabilitation interventions.

The MAL is widely applied in:

  • Stroke rehabilitation
  • Neurorehabilitation
  • Occupational therapy
  • Physical therapy
  • Neurology
  • Rehabilitation medicine
  • Clinical trials
  • Functional outcome research

Objective

The primary objective of the Motor Activity Log (MAL) is to provide a reliable and valid assessment of the real-world functional use of the affected upper extremity during everyday activities. The instrument helps clinicians determine how frequently patients incorporate the affected limb into daily life and how effectively they perform functional movements, thereby supporting treatment planning and outcome evaluation.

More specifically, the questionnaire aims to:

  • Assess the frequency of affected arm use during daily activities.
  • Evaluate the quality of upper-limb movements.
  • Monitor recovery following stroke or other neurological disorders.
  • Measure the effectiveness of rehabilitation interventions.
  • Detect learned non-use of the affected upper limb.
  • Support individualized rehabilitation planning.
  • Facilitate evidence-based research on upper-extremity functional recovery.

Scoring

The MAL is administered as a structured interview, during which patients rate their performance across a series of everyday activities involving the affected upper limb. The most commonly used version contains 30 daily activities, although abbreviated versions are also available. For each activity, participants provide ratings on two separate scales:

  • Amount of Use (AOU) – indicating how often the affected arm is used.
  • Quality of Movement (QOM) – indicating how well the affected arm performs the activity.

Both scales are typically scored from 0 to 5, where:

  • 0 = The affected arm is not used.
  • 5 = The affected arm is used as frequently and as effectively as before the neurological injury.

Average scores are calculated separately for the Amount of Use and Quality of Movement scales. Higher scores indicate more frequent spontaneous use of the affected upper limb, better movement quality, greater functional independence, and more successful neurological recovery.

Psychometric evaluation of the MAL commonly includes:

  • Internal consistency reliability (Cronbach’s alpha and McDonald’s Omega)
  • Test–retest reliability
  • Inter-rater reliability
  • Construct validity
  • Convergent and discriminant validity
  • Factorial validity using Confirmatory Factor Analysis (CFA)
  • Responsiveness to rehabilitation interventions
  • Measurement invariance across neurological populations

The MAL is considered one of the gold-standard patient-reported outcome measures for assessing upper-extremity functional performance after stroke and has demonstrated excellent reliability, validity, and sensitivity to clinical change.

References

Lang, C. E., Edwards, D. F., Birkenmeier, R. L., & Dromerick, A. W. (2008). Estimating minimal clinically important differences of upper-extremity measures early after stroke. Archives of Physical Medicine and Rehabilitation, 89(9), 1693–1700.

Taub, E., Uswatte, G., Morris, D. M., Barman, J., & Crago, J. E. (2013). Contribution of the Motor Activity Log to the measurement of real-world arm use following rehabilitation. Stroke, 44(4), 1103–1108.

Uswatte, G., Taub, E., Morris, D., Vignolo, M., & McCulloch, K. (2005). Reliability and validity of the Motor Activity Log-14 for measuring real-world arm use. Stroke, 36(11), 2493–2496.

van der Lee, J. H., de Groot, V., Beckerman, H., Knol, D. L., & Bouter, L. M. (2004). The Motor Activity Log: A new scale to measure motor activity in stroke patients. Journal of Rehabilitation Research and Development, 41(1), 1–11.

Winstein, C. J., Stein, J., Arena, R., et al. (2016). Guidelines for adult stroke rehabilitation and recovery. Stroke, 47(6), e98–e169.

Wolf, S. L., Lecraw, D. E., Barton, L. A., & Jann, B. B. (1989). Forced use of hemiplegic upper extremities to reverse the effect of learned nonuse among chronic stroke and head-injured patients. Experimental Neurology, 104(2), 125–132.