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