Table 1. Descriptive statistics for all variables by condition.
| Measures | M (SD) | Min | Max | Skewness | Kurtosis |
|---|---|---|---|---|---|
| Depletion Condition | |||||
| Video Task | |||||
| Motivation | 7.13 (1.39) | 4 | 9 | -0.25 | -0.67 |
| + Effort | 6.59 (1.84) | 1 | 9 | -0.83 | 0.43 |
| OSPAN | |||||
| Motivation | 6.49 (1.28) | 3 | 8 | -0.53 | -0.57 |
| Effort | 7.13 (1.03) | 3 | 8 | -1.19 | 1.31 |
| Proportion Correct | .39 (.14) | .05 | .80 | 0.24 | 0.16 |
| Video Task Memory Test | |||||
| * Accuracy (d’) | 0.54 (0.53) | -0.97 | 1.81 | -0.18 | -0.33 |
| Video Task Questions | |||||
| * Q1 | 7.70 (1.26) | 3 | 9 | -1.17 | 1.36 |
| * Q2 | 4.25 (3.39) | 0 | 9 | 0.04 | -1.55 |
| * Q3 | 2.19 (2.50) | 0 | 9 | 0.91 | -0.40 |
| * Q4 | 7.26 (2.48) | 0 | 9 | -1.56 | 1.50 |
| Control Condition | |||||
| Video Task | |||||
| Motivation | 7.17 (1.62) | 1 | 9 | -1.08 | 1.43 |
| + Effort | 6.07 (1.89) | 0 | 9 | -0.67 | 0.13 |
| OSPAN | |||||
| Motivation | 6.77 (1.18) | 2 | 8 | -1.35 | 3.35 |
| Effort | 7.06 (1.11) | 4 | 8 | -1.00 | -0.09 |
| Proportion Correct | .36 (.13) | .10 | .62 | -0.05 | -0.70 |
| Video Task Memory Test | |||||
| * Accuracy (d’) | 1.59 (0.91) | -0.32 | 3.51 | 0.13 | -0.52 |
| Video Task Questions | |||||
| * Q1 | 7.13 (1.72) | 1 | 9 | -0.87 | 0.50 |
| * Q2 | 6.75 (2.63) | 0 | 9 | -1.07 | 0.03 |
| * Q3 | 4.69 (2.67) | 0 | 9 | -0.29 | -0.80 |
| * Q4 | 3.06 (2.49) | 0 | 9 | 0.50 | -0.67 |
Note. Q1: “How well did you follow the instructions during the video task?”, Q2: “Did you think we were going to ask you about the words later in the experiment?”, Q3: “When you saw the words in the video, how hard did you try to remember them?”, Q4: “When you saw the words in the video, how hard did you try to ignore them?“
* Indicates condition mean differences (p < .05).
+ Indicates condition mean differences (p < .10).