Psychology: Research and Review
Table 2 BVRT performance by groups (Mann-Whitney test)
Groups | U | Z | p | η 2 | ||
|---|---|---|---|---|---|---|
DD (N = 31) | TD (N = 25) | |||||
Mdn (Range) | Mdn (Range) | |||||
BVRT—copy task | ||||||
Correct score | 8.72 (5–10) | 10 | 80.5 | −5.427 | < .001 | .53 |
Error score | 1.39 (0–5) | 0 | 80.5 | −5.427 | < .001 | .53 |
Distortions | 1.22 (0–4) | 0 | 80.5 | −5.428 | < .001 | .53 |
Omissions | 0 | 0 | 356.5 | 0 | 1 | 0 |
Perseverations | 0 | 0 | 356.5 | 0 | 1 | 0 |
Rotations | 0 | 0 | 356.5 | 0 | 1 | 0 |
Misplacements | 0.11 (0–1) | 0 | 138.0 | −4.598 | < .001 | .38 |
Time (minutes) | 7.36 (4–12) | 9.87 (6–23) | 157.0 | −3.666 | < .001 | .24 |
BVRT—memory task | ||||||
Correct score | 5.44 (4–8) | 5.67 (3–8) | 175.5 | −3.268 | .001 | .19 |
Error score | 7.22 (4–11) | 4.83 (4–5) | 156.0 | −3.621 | < .001 | .23 |
Distortions | 4.06 (1–7) | 3.44 (0–8) | 157.5 | −3.591 | .002 | .23 |
Omissions | 1.44 (0–6) | 0.22 (0–2) | 118.5 | −4.316 | < .001 | .33 |
Perseverations | 1.55 (0–3) | 0.33 (0–3) | 50.5 | −5.538 | < .001 | .55 |
Rotations | 0.56 (0–1) | 0.39 (0–1) | 212.0 | −2.625 | .009 | .12 |
Misplacements | 0.83 (0–3) | 0.56 (0–1) | 189.0 | −3.037 | .002 | .16 |
Time (minutes) | 9.61 (6–16) | 9.63 (6–18) | 231.0 | −2.270 | .023 | .09 |