In the Attitudes factor, P1, P2 and P3 have strong loadings of above 0.60 while P7 has a slightly lower factor loading at 0.438 but sufficiently to be retained as it is into the Attitudes domain. One reason for this phenomenon is that item P7 was a negatively phrased question. Some respondents might have overlooked the negative wording in item P7 while self-administering it. The second factor, Subjective Norms (SN) contained item P4, P5 and qhw.v5i4.5120 bmjopen-2015-010112 P6 to explore patient’s perceived social pressure to use pharmacy valueadded services. Factor loadings of these 3 items were moderate to strong (0.494-0.749). However, we found item P4 cross loading into the Attitudes factor because item P4 was Chloroquine (diphosphate) supplement sequenced immediately after item P3. The order effects of item P3 preceding P4 provided an attitudes context in respondents’ mind while attempting item P4. It is postulated that assimilation effects occur when responses to two questions are consistent and closer together due to their placement in the questionnaire. For the TPB model questionnaire, it is recommended that items be mixed up throughout the document with questions used to assess attitudes CycloheximideMedChemExpress Actidione interspersed with questions measuring subjective norms and perceived behavioral control.28 For this reason, items were intermixed between constructs (factors). Conventionally it was recommended that items of the same topic and relevance should be grouped together and unfolded in a logical order. Subsequently, P8, P9, P10, P12 and P13 loaded strongly into the 3rd factor (Perceived Behavioralwww.pharmacypractice.org (ISSN: 1886-3655)Tan CL, Hassali MA, Saleem F, Shafie AA, Aljadhey H, Gan VB. Development, test-retest reliability and validity of the Pharmacy Value-Added Services Questionnaire (PVASQ). Pharmacy Practice 2015 Jul-Sep;13(3):598. doi: 10.18549/PharmPract.2015.03.Control). Item P8 was initially constructed to be included into the ATT factor but the analysis showed that it had loaded into the PBC factor. It was found that P8 had the lowest communalities among all items at 0.271 (extracted value). Since the cut-off value to retain an item is 0.30, P8 was excluded from the final analysis. Questions P11, P14 and P15 are dependent variables (Intention) which are not included in factor analysis and hence are not shown. To illustrate the nature of questions assessing the Intention construct, the three items pertaining the dependent variable are shown as below. ?P11: I want to use pharmacy value-added services to collect my monthly medicine in the next 3 months. ?P14: I am interested to use one of the pharmacy value-added services to collect my monthly medicine within the next 3 months. ?P15: How far is your intention to use one of the pharmacy value-added services to collect your monthly medicine? All items from E1 to E7 were loaded strongly (>0.70) into the fourth factor (Expectations). This is expected as these seven questions were distictively phrased with expectations wording and were arranged lastly in the questionnaire. The possibility of fatigue effects in respondents might have encouraged greater similar agreement or less differentiation responses among the items. The validation process resulted in four significant expected factors with all items retained except item P8. The item rotation clearly showed that the utilization of a tested theoretical model to predict intention to use pharmacy value-added services by the Malaysian public was proven successful and established. Maintaining relevant questions.In the Attitudes factor, P1, P2 and P3 have strong loadings of above 0.60 while P7 has a slightly lower factor loading at 0.438 but sufficiently to be retained as it is into the Attitudes domain. One reason for this phenomenon is that item P7 was a negatively phrased question. Some respondents might have overlooked the negative wording in item P7 while self-administering it. The second factor, Subjective Norms (SN) contained item P4, P5 and qhw.v5i4.5120 bmjopen-2015-010112 P6 to explore patient’s perceived social pressure to use pharmacy valueadded services. Factor loadings of these 3 items were moderate to strong (0.494-0.749). However, we found item P4 cross loading into the Attitudes factor because item P4 was sequenced immediately after item P3. The order effects of item P3 preceding P4 provided an attitudes context in respondents’ mind while attempting item P4. It is postulated that assimilation effects occur when responses to two questions are consistent and closer together due to their placement in the questionnaire. For the TPB model questionnaire, it is recommended that items be mixed up throughout the document with questions used to assess attitudes interspersed with questions measuring subjective norms and perceived behavioral control.28 For this reason, items were intermixed between constructs (factors). Conventionally it was recommended that items of the same topic and relevance should be grouped together and unfolded in a logical order. Subsequently, P8, P9, P10, P12 and P13 loaded strongly into the 3rd factor (Perceived Behavioralwww.pharmacypractice.org (ISSN: 1886-3655)Tan CL, Hassali MA, Saleem F, Shafie AA, Aljadhey H, Gan VB. Development, test-retest reliability and validity of the Pharmacy Value-Added Services Questionnaire (PVASQ). Pharmacy Practice 2015 Jul-Sep;13(3):598. doi: 10.18549/PharmPract.2015.03.Control). Item P8 was initially constructed to be included into the ATT factor but the analysis showed that it had loaded into the PBC factor. It was found that P8 had the lowest communalities among all items at 0.271 (extracted value). Since the cut-off value to retain an item is 0.30, P8 was excluded from the final analysis. Questions P11, P14 and P15 are dependent variables (Intention) which are not included in factor analysis and hence are not shown. To illustrate the nature of questions assessing the Intention construct, the three items pertaining the dependent variable are shown as below. ?P11: I want to use pharmacy value-added services to collect my monthly medicine in the next 3 months. ?P14: I am interested to use one of the pharmacy value-added services to collect my monthly medicine within the next 3 months. ?P15: How far is your intention to use one of the pharmacy value-added services to collect your monthly medicine? All items from E1 to E7 were loaded strongly (>0.70) into the fourth factor (Expectations). This is expected as these seven questions were distictively phrased with expectations wording and were arranged lastly in the questionnaire. The possibility of fatigue effects in respondents might have encouraged greater similar agreement or less differentiation responses among the items. The validation process resulted in four significant expected factors with all items retained except item P8. The item rotation clearly showed that the utilization of a tested theoretical model to predict intention to use pharmacy value-added services by the Malaysian public was proven successful and established. Maintaining relevant questions.