A researcher was interested in determining whether type of therapy (hallucinogen administration vs. talk therapy) would affect patients' social anxiety scores. The researcher hypothesized that patients' who received a hallucinogen in a controlled setting would have different social anxiety scores than participants who received traditional talk therapy. The researcher used a single sample of 13 participants and participants took part in both treatment conditions. The mean of the difference scores was 7.0 (M. = 7). The SS for the differences scores was 144 (SS, = 144). The researcher set the alpha level at .05 (a = .05). What type of t-test should you do? O repeated-measures (related-samples) t-test O independent-samples t-test O single sample t-test