The BPRS is used for the measurement of psychiatric symptoms. The BPRS is an 18 item questionnaire and each question is rated on a 7 point scale ranging from 1 (not present) to 7 (extremely severe). The total score for the 18 question will be calculated by adding score of each question. The interpretation of the total scores are: 0-9 will indicate "not a schizoaffective case"; 10-20 will indicate "possible schizoaffective case"; and 21 or more, will indicate "evident schizoaffective case". Higher scores indicate worsening.

The CGI-S rating scale is a 7-point global assessment that measures the clinician's impression of the severity of illness exhibited by a participant. A rating of 1 is equivalent to "Normal, not at all ill" and a rating of 7 is equivalent to "Among the most extremely ill participants". Higher scores indicate worsening.

The CGI-C is a 7-point assessment scale of change in global clinical status, defined as a sense of well-being and ability to function in daily activities. CGI-C scores range from 1 (very much improved) through to 7 (very much worse). Higher scores indicate worsening.

The PSP is used as a measure of personal and social functioning of participants with psychiatric disorders. The PSP scale assesses the degree of difficulty a participant exhibits over a 1-month period within 4 domains of behavior: socially useful activities, personal and social relationships, self-care, and disturbing and aggressive behavior and provide rating from 1 to 100. Participants with score of 71 to 100 have a mild degree of difficulty; from 31 to 70 have marked difficulty and from 1 to 30, have represent severe degrees of difficulty. Lower scores indicate worsening.

Treatment satisfaction with previous anti psychiatric medication among participants with schizophrenia will be assessed by using the MSQ scale. It consists of 1 question: "Overall, how satisfied are you with your current antipsychotic medication(s)?" with responses assessed on a 7-point scale rated as follows: 1=extremely dissatisfied, 2=very dissatisfied, 3=somewhat dissatisfied, 4=neither satisfied nor dissatisfied, 5=somewhat satisfied, 6=very satisfied, and 7=extremely satisfied. Lower scores indicate worsening.

Treatment satisfaction with study medication (paliperidone palmitate) among participants with schizophrenia will be assessed by using the MSQ scale. It consists of 1 question: "Overall, how satisfied are you with your current antipsychotic medication(s)?" with responses assessed on a 7-point scale rated as follows: 1=extremely dissatisfied, 2=very dissatisfied, 3=somewhat dissatisfied, 4=neither satisfied nor dissatisfied, 5=somewhat satisfied, 6=very satisfied, and 7=extremely satisfied. Lower scores indicate worsening.