Comment Re:Do you give up higher cerebral function (Score 3, Informative) 211
Just for your convenience, then, here are all the statistics from the paper:
- Research in the United States has shown that 66% of men and 41% of women consume pornography on a monthly basis.3 An estimated 50% of all Internet traffic is related to sex.4
- Sixty-four healthy male participants (mean [SD] age, 28.9 [6.62] years, range 21-45 years) were recruited.
- Because the distribution of the reported PHs [hours of pornography use per week] was skewed and not normally distributed (Kolmogorov-Smirnov, Z=1.54; P<.05), we transformed the variable by means of square root (Kolmogorov-Smirnov, Z=0.77; P=.59).
- The overall Internet Sex Screening Test score was positively correlated with the reported PHs (r64=0.389, P<.01). On the Sexual Addiction Screening Test, participants scored 1.35 on average (SD, 2.03). A positive correlation was observed between PHs and Alcohol Use Disorder Identification Test score (r64=0.250, P<.05) and Beck Depression Inventory score (r64=0.295, P<.05).
And just because it's so important to the science, the rest of the results:
When correlating PHs (square root) with GM segmentations, we found a significant negative association in the right striatum, namely caudate nucleus (based on the automated anatomical labeling atlas34; peak voxel: x=11, y=5, z=3; P<.001; corrected for multiple comparisons) (Figure 1A). When we used a lower threshold of P<.005, an additional cluster in the left caudate reached significance (x=6, y=0, z=6), showing that the effect is not clearly lateralized. We refer to the cluster as the striatum; however, for the subsequent discussion, it is noteworthy that the cluster overlaps with a reward processing literature-based probabilistic region of interest of the ventral striatum, created by means of in-house software35 (predominantly monetary-incentive delay task, see eAppendix in Supplement for details).
As for alternative hypotheses, the only one they present is "Individuals with lower striatum volume may need more external stimulation to experience pleasure and might therefore experience pornography consumption as more rewarding, which may in turn lead to higher PHs."