共 50 条
- [28] TASK-DIFFICULTY AND TASK-PERFORMANCE IN AUTISTIC-CHILDREN JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY AND ALLIED DISCIPLINES, 1979, 20 (04): : 271 - 285
- [29] EXTERNAL EVALUATION, TASK-DIFFICULTY, AND CONTINUING MOTIVATION JOURNAL OF EDUCATIONAL RESEARCH, 1985, 78 (04): : 210 - 215
- [30] TASK-DIFFICULTY AND DRIVE IN VERBAL-LEARNING JOURNAL OF EXPERIMENTAL PSYCHOLOGY, 1960, 59 (06): : 361 - 365