The Research Descriptive Hypothesis

26 Table 3.1 Indicators of Parents Involvement No Indicator Item Number 1 Home Discussing school activities 1, 2, 21, 33 2 Aspiration and expectation 3, 6, 22, 23 3 Parenting Style 4, 5, 24, 32 4 Reading at home 7, 8, 9, 26 5 Checking homework 10, 11, 25, 30 6 Home rules and supervision 12, 19, 20, 34 7 School Contacting school personnel 13, 14, 18, 27 8 Attending PTO, etc. 15, 29, 31, 35 9 Volunteering at school 16, 17, 28 Total 35 The questionnaire in this study uses a Likert Type questionnaire which provided the students with four responses option Always selalu, Often sering, Sometimes kadang-kadang, Never tidak pernah. The degree of scale is described as follow: Table 3.2 The Questionnaire Scoring Scale Affirmative Statement Score Negative Statement Score Always 4 1 Often 3 2 Sometimes 2 3 Never 1 4 The questionnaire is translated into Bahasa Indonesia. This is aimed to avoid the possibility of different perception in understanding the statement. Therefore, using Bahasa Indonesia in the statement will be useful for students to understand and answer the question. 27 a Validity of Instrument “Validity refers to the degree to which a test measures what it is supposed to measure and, consequently, permits appropriate interpretation of scores.” 6 Validity test is very important in all forms of research because validity is the criteria of good instrument. In validating questionnaire, the researcher conducted the research in 8-A class of SMP Ibu Pertiwi, Jakarta Barat. The researcher got the standard coefficient validity minimum for this instrument with N = 35 and coefficient validity is 0.334. To see the validity instrument, the researcher use SPSS 20 to measure the validity of questionnaire. In the questionnaire validity, the writer got 26 items from 35 items. The number of valid item are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 16, 23, 17, 19, 20, 22, 24, 26, 27, 28, 30, 31, 34 and 35. The items that the researcher used only 25 items which can be seen as below: Table 3.3 Valid Items of Parents ’ Involvement No Indicator Item Number 1 Home Discussing school activities 1, 2, 2 Aspiration and expectation 3, 6, 22 3 Parenting Style 4, 5, 24 4 Reading at home 7, 8, 9, 26 5 Checking homework 10, 11, 30 6 Home rules and supervision 19, 20, 34 7 School Contacting school personnel 13, 27 8 Attending PTO, etc. 31, 35 9 Volunteering at school 16, 17, 28 Total 25 6 L. R. Gay, Geoffrey Mills and Peter Airasian, Educational Research, New Jersey: Pearson Education Inc., 2009, p. 154.