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Addressing Limitations of Visual Inspection
Single-subject researchers address concerns about the sensitivity and reliability of visual inspection by focusing exclusively on strong, consistent effects and employing the steady state strategy. If a treatment effect is weak or the data is noisy, researchers attempt to enhance the effect's strength or reduce noise by strictly controlling extraneous variables. If an effect remains difficult to detect visually despite these controls, single-subject researchers typically conclude it is not sufficiently robust or consistent to warrant further interest, rather than relying on statistical methods to detect weak effects.
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Research Methods in Psychology - 4th American Edition @ KPU
Learn After
In single-subject research, what is the typical conclusion if a treatment effect remains difficult to detect visually despite strictly controlling extraneous variables?
A researcher conducting a single-subject experiment notices that the treatment effect is weak and inconsistent across phases. Rather than switching to a statistical test to confirm the small effect, the researcher decides to tighten control over extraneous variables and modify the intervention to produce a stronger, more visually obvious change. This decision is consistent with how single-subject researchers typically handle data that is difficult to interpret through visual inspection.