Jainism teaches aparigraha (non-possessiveness) as a core ethical principle. However, designing and conducting a research study using psychological scales is a methodology rooted in modern psychology, not Jain scripture. Within Jainism, aparigraha is practiced to reduce attachment, promote contentment, and advance spiritual progress. Jain texts encourage self-reflection (swadhyaya), renunciation, and simplicity to experience inner peace and reduce karmic bondage.

If you wish to explore the effect of practicing aparigraha, here’s how Jain teachings might inspire such a study, within the context of Jain principles:

1. Define Aparigraha Practice:

Decide on practical steps aligned with Jain values, such as limiting material possessions, practicing gratitude, or consciously reducing desires and attachments for 10 days.

1. Self-Reflection (Swadhyaya):

In Jain tradition, self-observation and contemplation are recommended. Participants could keep a daily journal reflecting on their attachment levels, mental peace, and feelings of contentment.

1. Use of Established Scales:

Jain texts do not prescribe psychological scales. However, they advocate introspection and self-reporting. You may consider adapting the process to encourage honest self-assessment in line with Jain values of truthfulness (satya).

1. Spiritual Outcomes:

Jainism emphasizes inner transformation, reduction of greed, and non-attachment as outcomes. After 10 days, participants could reflect on changes in their sense of peace, reduced craving, and clarity of mind.

If you are seeking to use specific psychological scales (such as the Satisfaction with Life Scale or Mindfulness scales), this goes beyond traditional Jain practice, but you could complement such tools with Jain methods of self-examination and reflection.

Summary (based on Jain principle):

• Practice aparigraha for 10 days through conscious limitation of desires and possessions.
• Engage in daily self-reflection and journaling, focusing on attachment, contentment, and peace.
• At the end, assess changes in mental state and spiritual progress, as per Jain teachings on non-attachment.

For a research methodology using psychological scales, you will need to consult scientific literature, as this is not part of Jain scripture or tradition.