Task difficulty increases error counts, with significantly more errors on Medium and Hard tasks than Easy tasks¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2026 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Participants committed significantly more errors on Medium and Hard tasks than on Easy tasks, with a non-significant difference between Medium and Hard. → Veronica Pimenova 2026

Evidence¶

Veronica Pimenova 2026¶

Veronica Pimenova, Chris Lee, Baramee Bhakdibhumi, Simon Chu, and Andrew Begel. (2026). Leveling the Playing Field: Temporal Video Segmentation for Individuals with ADHD in Computing Education. https://arxiv.org/abs/2607.24612 doi:10.48550/arxiv.2607.24612

q3 · i? · causal · r2

Poisson GLMM analysis of error counts from the within-subjects study (N=162 observations, 27 participants). The article reports "significantly more errors on Medium tasks" and Hard tasks relative to Easy; the Medium–Hard contrast did not reach significance (p=.472).

"Using Easy tasks as the baseline, participants committed significantly more errors on Medium tasks (𝛽= 1.54,𝑝<. 001) and Hard tasks (𝛽= 1.85,𝑝<. 001)."

Discussion¶

Related Claims¶

• Easy tasks showed a floor effect across all participants and were excluded from hypothesis testing — related
• Task difficulty increases hesitations, with significantly more hesitations on Medium and Hard tasks than Easy tasks — related
• Success rates decrease monotonically from easy to medium to hard difficulty levels across all models — related
• Task difficulty (easy vs difficult simultaneous-equation problems) has significant main effects on intrinsic and extraneous cognitive load, but not on germane load — related
• Goal setting improves performance — related
• Theoretical quality of both theory-based and non-theory agents remains stable across Easy, Medium, and Hard scenario difficulty levels — related