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Saifuddin Azwar
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Konstruksi Skala Kepedulian terhadap Penggunaan Energi Rizal Kurniawan; Saifuddin Azwar
Jurnal Ilmu Perilaku Vol 1 No 1 (2017): Jurnal Ilmu Perilaku
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (949.058 KB) | DOI: 10.25077/jip.1.1.22-32.2017

Abstract

Using electricity and fuel oil might have some negative impact towards the national economy and the environment. Psychological scale for measuring awareness of energy usage has never been tested before. The main purpose of this study is to construct psychological scale for measuring energy usage. The concept of Amburgey (2012) has been used to describe of psychological concern that are perceived threat and desired change. Perceived threat is an evaluation of a person to a problem and desired change is one’s willingness to resolve that problem. Four hundred-thirty eight students were enrolled in this study with a mean of age 21 years old. The results of content item validation show that one item from perceived threat’s subscale has value of Aiken (V) less than .50 and all of items from desired change’s subscale have V value greater than .50. Result from item’s discrimination process show that 40% items from perceived threat’s subscale has low of discrimination power and desired change’s sub scale has 31%. Alpha value for perceived threat’s subscales is .76 and desired change’s sub scale is .78. The concern for energy usage scale has poor model fit.
Penskalaan Thurstone pada Aitem Thyroid Dysfunction Questionnaire (TDQ) Berbasis Gejala Biopsikososial - Mutalazimah; Saifuddin Azwar; Bhisma Murti
Jurnal Psikologi Vol 41, No 2 (2014)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.782 KB) | DOI: 10.22146/jpsi.6945

Abstract

Thyroid function disorders can affect the biological, psychological and social conditions of the sufferer. This study aimed at developing a thyroid dysfunction questionnaire (TDQ) based on a biopsychosocial phenomenon, which is the impact of hypothyroidism and hyperthyroidism. The development of this instrument began with identification of the measurement objectives, domains and items. The procedures of Thurstone Scaling were done with analysis of content validity using the Content Validity Ratio (CVR) and Content Validity Index (CVI), which were formulated by three experts of thyroid and endocrinology. Every item in the TDQ was determined through median analysis based on the valuation results done by 44 internists from hospitals and 44 doctors from Puskesmas (Public Health Center) with 11 categories of response (1-11). The results of CVR analysis ranged from 0.33 to 1.00 and the value of CVI was 78%. It showed that the experts had adequate rate of homogeneity to judge the relevance of the 33 items in TDQ. The median analysis showed that the 33 items of TDQ had scores ranging from 4 to 10. Thus, it was expected that the TDQ scores on this interval scale would facilitate observer to make an interpretation of the examination of thyroid function of the subjects. Keywords: Thurstone scaling, thyroid dysfunction questionnaire, experts’ judgment, biopsychosocial
Abilitas Komposit dalam Tes Potensi Saifuddin Azwar; Ali Ridho
Jurnal Psikologi Vol 40, No 2 (2013)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.506 KB) | DOI: 10.22146/jpsi.6972

Abstract

When a unidimensionality assumption has been actually violated, interpretation of test scores might be jeopardized. It couldn’t be overemphasized in case of high-stake exams such as PAPs UGM (academic potentiality test for UGM graduate student candidates) which was supposed to reflect a composite ability. This study aimed at revealing item characteristics of PAPs A-1 Series based on UIRT and MIRT and discovering dimensionality of the three subtests of the test. Scores of subject (n=2035) on the 3 subtests were analysed and the results showed that 27 items (10 of Verbal, 8 of Kuantitatif, and 9 of Penalaran) were flagged for having rbis of less than 0.25 and 6 other items for having abnormally high pseudo-guessing parameters. Dimensionality analyses found out that Penalaran subtest was local-dependent while Verbal and Kuantitatif subtests both were local-independent. In addition, MIRT analyses failed to fully describe item characteristics of the test due to effect of interaction among probabilities of correct response of the three subtests. Keywords: dimensionality, PAPs UGM, MIRT, UIRT
EFIKASI DIRI DAN PRESTASI BELAJAR STATISTIKA PADA MAHASISWA Saifuddin Azwar
Jurnal Psikologi Vol 23, No 1 (1996)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (165.462 KB) | DOI: 10.22146/jpsi.10041

Abstract

Penilaian akan efikasi-diri merupakan salah satu faktor personal yang menjadi perantara interaksi antara faktor perilaku dan faktor lingkungan. Efikasi-diri yang dipersepsikan oleh individu merupakan salah satu faktor penentu keberhasilan dalam performansi yang akan datang, pada gilirannya kemudian, dapat pula menjadi faktor yang ditentukan oleh pola keberhasilan-kegagalan performansi yang pernah dialami.
ASUMSI-ASUMSI DALAM INFERENSI STATISTIKA Saifuddin Azwar
Buletin Psikologi Vol 9, No 1 (2001)
Publisher : Faculty of Psychology Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (48.311 KB) | DOI: 10.22146/bpsi.7436

Abstract

Berbeda dari statistika nonparametrik yang disebut dengan distribution-free statistics atau disebut juga statistika sampel kecil, statistika parametrik diderivasi dari model distribusi normal atau distribusi-distribusi skor populasi tertentu. Di samping itu, rumusan tehnik-tehnik komputasi guna pengambilan kesimpulan (inferensi) lewatuji statistika parametrik didasarkan pada model distribusi yang diketahui, sehingga penggunaannya pun dilandasi oleh berlakunya asumsi bahwa ada kesesuaian antara data sampel dengan model distribusi yang bersangkutan (data-model fit).
EFEK SELEKSI AITEM BERDASAR DAYA DISKRIMINASI TERHADAP RELIABILITAS SKOR TES Saifuddin Azwar
Buletin Psikologi Vol 17, No 1 (2009)
Publisher : Faculty of Psychology Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (205.561 KB) | DOI: 10.22146/bpsi.11479

Abstract

Seventy three items of IPA (science) test used in the 2006 University of Gadjah Mada under‐graduate admission procedure (Utul UM UGM) were analyzed to reveal the effect of eliminating items based on corrected item‐total correlation coefficient on reliability of the test. Computations of reliability estimates for four different lengths of test (n=11.287) showed that reducing less discriminating items did not lower reliability coefficients as predicted by Spearman‐Brown prophecy. In fact, length of test was practically irrelevant to reliability coefficient when the test consisted of highly discriminating items.
Co-Authors Ali Ridho Bhisma Murti Mutalazimah Mutalazimah Rizal Kurniawan