Table 3 Pearson’s product moment correlation of response time and difficulty estimates (grammar items)

1. Response time grammar items (first set)

Pearson

–

.085

.640^**

.136

Sig. (2-tailed)

.520

.000

.301

2. Difficulty estimates grammar items (first set)

Pearson

–

.124

.046

Sig. (2-tailed)

.345

.725

3. Response time grammar items (second set)

Pearson

–

− .151

Sig. (2-tailed)

.249

4. Difficulty estimates grammar items (second set)

Pearson

–

Sig. (2-tailed)