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. 2006 Nov 8;33(4):1038–1053. doi: 10.1093/schbul/sbl051

Table 3.

Tasks Assessing Processing Speed and Psychomotor Performance Showing Associations with Negative Symptoms or Liddle's Psychomotor Poverty in Cross-Sectional and Longitudinal Studies

Neuropsychological Tasks and Studies
Cross-sectional studies
    Processing-speed tasks
        Trailmaking test123,126–128
        SDST57,123,128
        Slower responses on 2-choice guessing task129
        Prolonged critical interstimulus interval in the backward masking task130
        Reaction-time paradigms50,131
    Psychomotor tasks
        Pegboard task, finger tapping33
        Drawing tasks (M. Morrens et al, unpublished data)
Longitudinal studies
    Processing-speed tasks
        SDST and verbal fluency59,128
    Psychomotor tasks
        Drawing tasks35

Note: SDST = Symbol Digit Substitution Test.