Speed Deterioration (>10 sec.) Stability (±10 sec.) Improvement (<10 sec.) Frequency (%) 23 (19.5) 43 (36.4) 52 (44.1) Mean (SD) 37.8 (35.8) -1.0 (6.2) -28.5 (28.0) Errors Deterioration (>2 or more errors) Stability (±0 to 1 error) Improvement (-2 or more errors) Frequency (%) 32 (27.1) 52 (44.1) 34 (28.8) Mean (SD) 5.1 (4.7) 0.1 (0.7) -4.4 (3.8)

Table 4: Deterioration, stability or improvement in participants on Stroop Test (part 3) for both speed and error scores (n=118).