Non-laxative preparation was rated more positively than enema or full-laxative preparations [ effect size ( r ) = 0.13 to 0.54 ; p < 0.0005 to 0.036 ] ; both forms of CTC and FS were rated more positively than OC in terms of test experience ( r = 0.26 to 0.28 ; all p-values < 0.0005 ) .