Table 3. Results of correlations between cannabis consumption, problems with cannabis use, and prospective memory.
| Full Sample (N = 144) | Chronic Users (N = 48) | |
| Cannabis Consumption | Problems with Use | |
| PMQ | ||
| Episodic Prospective Memory | r (142) = .20, p = .02, r2 = .04 | r (46) = .49, p <.001, r2 = .24 |
| Habitual Prospective Memory | r (142) = .07, p = .39, r2 = .005 | r (46) = .24, p = .09, r2 = .06 |
| Internally-Cued Prospective Memory | r (142) = .23, p = .006, r2 = .05 | r (46) = .45, p = .001, r2 = .20 |
| Memory Aiding Strategies | r (142) = .05, p = .53, r2 = .003 | r (46) = .12, p = .40, r2 = .01 |
| PRMQ | ||
| Prospective Memory | r (142) = .19, p = .02, r2 = .04 | r (46) = .38, p = .008, r2 = .14 |
| TCPMQ | ||
| Time-Based Prospective Memory | r (142) = .01, p = .93, r2 = .0001 | r (46) = .40, p = .005, r2 = .16 |
| Punctuality | r (142) = .15, p = .07, r2 = .02 | r (46) = .47, p = .001, r2 = .22 |
| Memory Aiding Strategies | r (142) = .12, p = .14, r2 = .01 | r (46) = .01, p = .93, r2 = .0001 |
| Prospective Memory Tests | ||
| Reminder Test | r (142) = .07, p = .41, r2 = .005 | r (46) = .19, p = .19, r2 = .04 |
| Call In Test | r (142) = –.06, p = .50, r2 = .004 | r (46) = –.31, p = .03, r2 = .10 |
| Fruit Test | r (142) = .04, p = .65, r2 = .002 | r (46) = .00, p = .98, r2 = .00 |
Note: bold indicates p≤.01. PMQ = Prospective Memory Questionnaire; PRMQ = Prospective and Retrospective Memory Questionnaire; TCPMQ = Time−Cued Prospective Memory Questionnaire. Higher scores on the prospective memory questionnaires indicate more prospective memory failures or greater use of memory aiding strategies. Higher scores on the cannabis consumption and problems with use variables indicate greater cannabis consumption and more problems associated with cannabis use, respectively. Higher scores on the prospective memory tests indicate better prospective memory test performance.