IB Internal Assessment (IA) Psychology Higher level (HL) 2026 May Solution & Worked Answer

The Effect of Font Legibility on Predicted Effort and Motivation in Filipino High School Students

Solution Overview

This investigation explores whether font legibility influences predicted effort and motivation among Filipino high school students. The study employs an independent samples design, comparing an easy-to-read font (Arial) with a difficult-to-read font (Herr Van Muellenhoff) to measure their impact on task effort prediction and willingness to perform.

Using a sample of 25 participants and non-parametric Mann-Whitney U tests, the researcher found no statistically significant difference between conditions, failing to replicate the original findings of Song & Schwarz (2008). The paper is distinguished by its rigorous control of extraneous variables and a nuanced evaluation of construct validity, specifically addressing self-report bias and questionnaire wording errors.

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