A Questionnaire for the Principals
Questionnaire for the principals equally consisted of a section on demographic
information, purpose of teacher appraisal, teacher appraisal methods, use of TPA
feedback and suggestions on how TPA system can be improved. Like the teachers
questionnaire, the principal‟s questionnaire consist
ed of closed ended, likert and
open ended questions expected to provide quantitative and qualitative data
Validity of the Instrument
“Validity refers to the extent to which empirical measurement adequately reflect real
measurement of the concept under consideration” (Babbie
of the study instruments was determined by Dr. George A. Onyango and Dr.
Mukirae Njihia from the department of Educational Management Policy and
Curriculum Studies, Kenyatta University who are experts in this field of study. They
assessed and provided feedback on the corrections which was required. Their input
was used to improve ambiguity in questions, biases and wrong wordings.
Piloting is approved by Kombo and Delno (2006). They observed it supports to
know how feasible the study can be. After coming up with research instruments,
they were put to test in two schools outside the sampled group. The way piloting
was done was similar to the way it was done in the actual study. Weaknesses in
relation to validity and reliability were then addressed before the real study was
rolled based on the piloting results.