Statistical Methods for Psychology

values for each F, they still have a role to play, and her table can be found in the appendix of this book.) For the Bonferroni ...

we will solve for and refer that to Dunn’s tables. Taking the pairwise tests first, the calculations follow. Mc-M versus M-M: S- ...

when our interest is in a specific subset of contrasts. In general, however, multistage procedures would not be used as a substi ...

number is indexed by “Order (i)” in the Table 12.3. These critical values are presented in the right-hand column above. They wer ...

problems (as measured by Achenbach’s Youth Self-Report Form [YSR] and by the Child Behavior Checklist [CBCL]). The study represe ...

third row. We continue this procedure until we find a row at which the obtained pvalue in column 4 exceeds the critical pvalue i ...

To calculate the variance, we will use Winsorized samples, in which the lowest 8 scores are replaced with the 9th lowest score a ...

are looking at comparisons of individual means, or sets of means, it generally makes more sense to calculate confidence limits o ...

the average sample variance of the two groups in question (perhaps weighted if the sam- ple sizes were unequal). In this case it ...

You can see clearly that we are taking the difference between the mean of the first two groups and the third group. The second q ...

388 Chapter 12 Multiple Comparisons Among Treatment Means Table 12.6 Means of conditions in our morphine example Groups: M-S M-M ...

trials is evidenced by a nonsignificant difference between the means of conditions M-M and S-S (t(35) 5 0.35, t.025 5 2.03. 12.6 ...

where and represent the largest and smallest of a set of treatment means and ris the number of treatments in the set. You probab ...

our actual difference with the minimum significant difference. This approach is frequently taken by computer based post hoc proc ...

From Appendix qwe find that with 35 df for MSerrorand rset at 5, the critical value of qequals 4.07. If we use r 5 5 for all com ...

where is taken from the tables of the Studentized range statistic on degrees of freedom. This is basically the solution referred ...

level of significance, rather than always using at the alevel of significance. This suggestion was then modified by Einot and Ga ...

the tests we have discussed. Partly to overcome this objection, Scheffé proposed that peo- ple may prefer to run his test at a5. ...

Because we have a two-tailed test ( was taken from two-tailed tables), the sign of the difference is irrelevant. The last two di ...

The procedure we will follow is called the Benjamini and Hochberg’s Linear Step Up (LSU) procedure.^12 I will not take the space ...