Page 25 - A Step-By-Step Guide to Questionnaire Validation Research

all the questions in the questionnaire will have to be based

on the findings obtained from the textbooks and existing

literature. The responses elicited from the respondents by

using this type of questionnaire will be transformed into a

score and a pre-determined cut-off score is used to

distinguish between the state of having the disease (i.e.

‘with disease’) or not having the disease (i.e. ‘without

disease’) (Bujang & Tan-Hui, 2022).

The process of screening patients for a disease or

performing diagnostic procedures on patients occur

frequently in clinical medicine. These patients can o en

be diagnosed by using methods like structured interviews

such as those conducted by psychiatrists for diagnosing

depression. While in other instances, the diagnosis can

also be confirmed by using a specialized machine.

However, it is o en too time-consuming and/or costly to

employ such diagnostic procedures as a structured