Notes. These forest plots compare the differences between autonomy-supportive and controlling-instruction conditions on in-lab measures against the interval null of -.30 and .30. In these plots, the blue squares represent the standardized differences (Cohen’s d) observed in Study 1 and Study 2, with 95% confidence intervals (CI) around those coefficients. The dotted vertical lines represent the upper and lower bounds of the interval null. The effects that have 95% CI falling within the interval null were determined too small to be practically meaningful. Standardized differences that fall to the right of zero value indicates that the mean of autonomy-supportive instruction condition was greater than control; the ones to the left of zero value indicates that the mean of controlling-instruction condition was greater.