implementation validity objective procedure RELATED activity sample problem OF III APPENDIXES CONCLUSIONS teaching students' explicit taught analyzing index difficulty finding IMPLICATIONS student REFERENCES frrunework analysi RESEARCH interaction research between hypothese DRTA IV limitation control design REVIEW internal using conceptual comprehension significance homogeneity oflnstrument INTRODUCTION CONTENTS tryout directed questionnaire ANALYSIS ofdrta implication normality CHAPTER LITERATURE background study description population test TABLE reading statistical low reliability oftreatment collection page treatment discrimination DATA SUGGESTIONS data thinking discussion difference instrument ofreading conclusion achievement technique PROCEDURES requirement testing suggestion scope curiosity external instruction high hypothesi