Development and Psychometric Testing of HPV Knowledge Scale

research process after obtaining school principal. because the target population was parents who have daughters in elementary schools.

All participants (parents) were recruited from 5 elementary schools. According to a minimum sample size estimation for a psychometric study, it needs 10 times the total number of items (Boateng, 2018). the total participants, 52 items x 10= 520 participants were required.

The researchers got approval from schools to invite parents to attend the school of event invitations. Each participant came to the school where their child attended. Parents attended the regular meeting on the appointed day. at that time, researchers approached potential participants to explain to them the purpose of this study, participant rights, risks, and benefits. The researcher obtained participants' consent to participate in this research with a serial number.

During the process, researchers keep the participant anonymous. The questionnaires were distributed to the participants and took around 15-20 minutes to complete. All data was recapitulated and stored in Excel format. Data were kept by the researcher to maintain confidentiality. All data analyses were performed using SPSS software from IBM Corp.

Statistical analyses are below:

• Descriptive analysis was used to identify population characteristics
• Validity testing contains Exploratory and Confirmatory factor analyses were structure and construct.
• Reliability testing was done using Cronbach alpha to determine the instrument's reliability.

Inclusion criteria

• Participants have a child in elementary school
• Participants could speak Bahasa Indonesia fluently
• Participants live with their children in one house
• Participants are willing to participate in the study

Exclusion criteria

• parents had mental, visual, and hearing impairments or problems diagnosed by doctors
• their children' age are over 14 years old.