11_RBF

11_RBF - Randomized Block Factorial Design(RBF-pq(Kirk...

This preview shows pages 1–4. Sign up to view the full content.

Randomized Block Factorial Design (RBF- pq ) (Kirk, pp.456-461) • CR- p could be improved by RB- p . • Similarly, CRF- pq can be improved by RBF- pq by blocking effect. • Assume n blocks n homogeneous groups of people, or n people with p x q repeated measures (model – additive model) () , ijk j k jk i ijk Y =µ+α +β + αβ +π +ε π i … the effect of block i . All other terms are the same as in CRF- pq . (example) • Police officer data • Assume that, prior to the experiment , officers were grouped by their pretest attitude scores in to 5 groups, where 9 officers in each group. • Then the experimenter randomly assigned 9 officers in each group to one of the 9 treatment levels 5 blocks, and 9 people in each block.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
49 34 10 26 27 21 28 25 24 s5 42 36 18 27 22 26 38 27 29 s4 53 39 20 45 31 34 29 36 33 s3 52 50 21 36 40 30 47 44 42 s2 64 41 31 46 35 39 48 43 37 s1 a3b3 a3b2 a3b1 a2b3 a2b2 a2b1 a1b3 a1b2 a1b1 (Table 10.6-1 in Kirk) (Data layout) (SPSS procedure) • Use “GLM-Univariate” procedure. • Exactly the same as the RB- p case, except • Specify 2 fixed factors, instead of 1 • Specify 3 main effects ( α j , β k , and π i ), and an interaction between the two fixed factors ( αβ ) jk
Tests of Between-Subjects Effects Dependent Variable: SCORE 55125.000 1 55125.000 136.523 .000 1615.111 4 403.778 190.000 2 95.000 4.788 .015 634.889 32 19.840 1543.333 2 771.667 38.894 .000 634.889 32 19.840 1615.111 4 403.778 20.351 .000 634.889 32 19.840 1236.667 4 309.167 15.583 .000 634.889 32 19.840 Source Hypothesis Error Intercept

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 7

11_RBF - Randomized Block Factorial Design(RBF-pq(Kirk...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online