TABLE 1.
Demographics of participants.
| All Subjects |
Envelope |
Disk |
Chi-Square or t-Test |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Complete | Quality | Validated | Complete | Quality | Validated | Complete | Quality | Validated | C–C | Q–Q | V–V | Statistics | |
| Ethnicity | |||||||||||||
| C | 35 | 27 | 20 | 22 | 18 | 14 | 13 | 9 | 6 | 6.02 | 2.86 | 0.60 | Chi-square |
| A | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0.05 | 0.24 | 0.74 | p-value |
| AA | 12 | 8 | 5 | 3 | 3 | 2 | 9 | 5 | 3 | ||||
| Object taken | |||||||||||||
| Took ring | 26 | 21 | 16 | 14 | 11 | 10 | 12 | 10 | 6 | 0.00 | 1.62 | 1.21 | Chi-square |
| Took watch | 22 | 15 | 9 | 12 | 11 | 6 | 10 | 4 | 3 | 0.96 | 0.20 | 0.27 | p-value |
| Ages | |||||||||||||
| Avg. age | 30.8 | 30.8 | 31.6 | 31.2 | 31.3 | 32.6 | 30.2 | 29.9 | 29.8 | −0.34 | −0.40 | −0.65 | t-value |
| SD | 9.6 | 10.0 | 10.4 | 10.0 | 10.8 | 11.4 | 9.3 | 8.9 | 8.6 | 0.73 | 0.69 | 0.52 | p-value |
| Low | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | ||||
| High | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 44 | 43 | ||||
| Gender | |||||||||||||
| M | 25 | 18 | 12 | 13 | 10 | 7 | 12 | 8 | 5 | 0.10 | 0.47 | 0.32 | Chi-square |
| F | 23 | 18 | 13 | 13 | 12 | 9 | 10 | 6 | 4 | 0.75 | 0.49 | 0.57 | p-value |
| Employment | |||||||||||||
| FT | 5 | 3 | 2 | 1 | 0 | 0 | 4 | 3 | 2 | 4.15 | 6.14 | 2.13 | Chi-square |
| FT-MUSC | 19 | 14 | 10 | 11 | 9 | 7 | 8 | 5 | 3 | 0.39 | 0.19 | 0.55 | p-value |
| PT | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | ||||
| PT-MUSC | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | ||||
| Student | 22 | 17 | 11 | 12 | 11 | 7 | 10 | 6 | 4 | ||||
| Handedness | |||||||||||||
| L | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 0.20 | 0.04 | 0.18 | Chi-square |
| R | 45 | 33 | 22 | 24 | 20 | 14 | 21 | 13 | 8 | 0.65 | 0.84 | 0.67 | p-value |
| Education | |||||||||||||
| Avg. years | 16.0 | 15.9 | 15.7 | 15.9 | 16.0 | 15.7 | 16.2 | 15.7 | 15.9 | 0.51 | −0.42 | 0.29 | t-value |
| SD | 2.0 | 2.0 | 1.9 | 2.2 | 2.1 | 1.9 | 1.8 | 1.8 | 2.0 | 0.62 | 0.68 | 0.78 | p-value |
| Min | 12 | 12 | 12 | 13.0 | 13.0 | 13.0 | 12 | 12 | 12 | ||||
| Max | 20.5 | 20.5 | 18 | 20.5 | 20.5 | 18.0 | 20 | 18 | 18 | ||||
| Time to scan | |||||||||||||
| Avg. time | 78.9 | 86.9 | 68.5 | 56.8 | 60.4 | 51.5 | 105.0 | 128.6 | 98.7 | 2.12 | 2.44 | 1.60 | t-value |
| SD | 81.3 | 87.2 | 72.9 | 66.4 | 66.6 | 57.6 | 90.6 | 101.2 | 90.2 | 0.04 | 0.02 | 0.12 | p-value |
| Min | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 5.5 | 24.0 | 24.0 | ||||
| Max | 312.0 | 312.0 | 312.0 | 216.0 | 216.0 | 216.0 | 312.0 | 312.0 | 312.0 | ||||
Under ethnicity, C, A, and AA represents Caucasian, Asian, and African-American. Object taken reflects the number of subjects who chose to take a ring or a watch. M and F represents male and female. FT, FT-MUSC, PT, PT-MUSC, and student represents full-time worker, full-time at MUSC, part-time, part-time at MUSC, and full-time student, respectively. L and R represent left and right. Education is the number of years the person has spent in school. Time to scan is from the time they met with ELG for Visit 2 to the time of their fMRI scan. Statistical comparisons were made between the Complete No-crime versus Complete Mock-crime (C–C), Quality No-crime versus Quality Mock-crime (Q–Q), and Validation No-crime versus Validation Mock-crime (V–V) groups using either a Chi-square test or a two-sample two-way t-test. Statistically significant t-values and Chi-square values are shown highlighted in bold. The only significant differences were for ethnicity in the C–C comparison and time to scan for the C–C and Q–Q comparisons.