RESEARCH KERLINGER DESIGN Research design Blueprint Plan Structure

ย แบบการวจย (RESEARCH KERLINGER: DESIGN) Research design - Blueprint - Plan - Structure - Strategies 3

PURPOSES OF DESIGNING RESEARCH 1. TO ANSWER THE RESEARCH QUESTIONS 2. TO CONTROL THE VARIANCES (MAX- MIN- CON PRINCIPLES) 2. 1 MAX. OF SYSTEMATIC VARIANCES 2. 2 MIN. OF ERROR VARIANCES 2. 3 CON. OF EXTRANEOUS VARIANCES 4

CONTROL OF EXTRANEOUS VARIANCES 1. ELIMINATION 2. RANDOMIZATION, RANDOM ASSIGNMENT 3. MATCHING, BLOCKING 4. STATISTICAL CONTROL 6

E L L O N C A G T I A S D DE RES STR EA ATE RCH GIE S RESEARCH DESIGN INSTRUMENTAL DESIGN SA M P L DE ING S I G N N O I CT S I S Y L A N N A IG A T DES A D 7

แบบการวจย (Kirk’s research strategies) - Experimental research - Quasi-exp. research, causal survey research - Time series and single subject study - Prospective (cohort/longitudinal) study - Ex-post facto study or retrospective study - Sequential/longitudinal-overlapping study - Time lag study - Survey research - Case study or naturalistic research

TRUE-EXPERIMENTAL DESIGN 1. PRETEST-POSTTEST CONTROL GROUP DESIGN R E: O X O (Ancova; t-test) C: O O 2. SOLOMON FOUR-GROUP DESIGN E 1: O X O (twoway anova) C 1: O O R E 2: X O C 2: O 3. STATIC-GROUP COMPARISON X O (t-indpendent groups) R E: 9 C: O