Slide 6: Methodology
- The randomized, true experimental, pretest-posttest control group, and single-blind design were used to
investigate the effects of PPPI
- The clinical setting was the pediatric surgical ward in Thailand
- Sample size predictions employed the use of power analysis with a probability of a type one error of .05, a
power of .80, and a medium effect size of .25 (Bossert, 1994; Cohen, 1988; Hart & Bossert, 1994).
- Using Cohen’s power table for F test on two means with equal sample size in the analysis of covariance,
the expected sample size for each group was 64.
- The final subjects were 104 with 53 subjects for the experimental group and 51 participants for the control
group.
- More details about small sample size will be discussed later.
Slide 6: Methodology - The randomized, true experimental, pretest-posttest control group, and single-blind design were used to investigate the effects of PPPI- The clinical setting was the pediatric surgical ward in Thailand- Sample size predictions employed the use of power analysis with a probability of a type one error of .05, a power of .80, and a medium effect size of .25 (Bossert, 1994; Cohen, 1988; Hart & Bossert, 1994). - Using Cohen’s power table for F test on two means with equal sample size in the analysis of covariance, the expected sample size for each group was 64. - The final subjects were 104 with 53 subjects for the experimental group and 51 participants for the controlgroup.- More details about small sample size will be discussed later.
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