posttest validity objective procedure average iii experiment sample instructional type problem OF III dependent teaching direct interference guided refraction independent value APPENDIX table result stationer student disadvantage REFERENCES deviation analysi location RESEARCH learning research dispersion IV limitation control content design REVIEW transversal conceptual advantage comprehension appendix homogeneity vii equation sheet RESULT definition psychomotor CONTENTS diffraction basic II normality CHAPTER LITERATURE figure background model benefit METHOD affective population test about DISCUSSION TABLE clas formulation cognitive preface polarization purpose legitimate implement determine viii discovery time longitudinal framework syntax data discussion SUGGESTION list wave domain instrument activitie conclusion achievement variable technique aim CONCLUSION identification testing suggestion characteristic material standard sinusoidal INRODUCTION pretest abstract hypothesi biography