Understanding patterns

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University of Michigan, Flint *

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PSY-401

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Statistics

Date

Feb 20, 2024

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docx

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3

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Minor Assignment - Understanding & Predicting Patterns in Data Being able to understand and work with patterns in data are an important part of the scientific process. Good hypotheses, good data analysis, good visualizations all depend upon being able to effectively work with data. 1. Predictive versus Postdictive Confidence– Guided in tutorial Video Hypothesis : Witnesses making predictive confidence judgements will be less confident than witnesses making postdictive confidence judgments. A) Identify the independent variable (IV) IV: before the lineup (predictive) or after the lineup (postdictive) B) Identify the dependent variable (DV) -- what kind of data is it? Confidence C) Restate the hypothesis in terms of measures or comparisons of the IV relative to the DV Before the lineup assessment, average confidence will be lower After lineup assessment, average confidence will be higher D) What would the Null hypothesis be? Witnesses who make a predictive confidence judgement will be no different (or the same) as witnesses making a postdictive confidence judgement. E) Graph what the pattern of data might look like (you will be making up numbers here) IF the research hypothesis was found to be correct. 2. Wild Card versus Normal Lineups for children– Guided in tutorial video Hypothesis : The wild card lineup will lead to fewer false identifications and fewer foil identifications (and thus more rejections in target absent lineups) A) Identify the independent variable (IV)
B) Identify the dependent variable (DV) – what kind of data is it? C) Restate the hypothesis in terms of measures or comparisons of the IV relative to the DV D) What would the Null hypothesis be? E) Graph what the pattern of data might look like (you will be making up numbers here) IF the research hypothesis was found to be correct. 3. Confidence after investigator feedback (Post ID Feedback)– On your own Hypothesis : Witness confidence will be higher after an investigator provides confirming feedback (e.g., “You identified the suspect!”) compared to when no feedback is provided A) Identify the independent variable (IV) B) Identify the dependent variable (DV) – what kind of data is it? C) Restate the hypothesis in terms of measures or comparisons of the IV relative to the DV D) What would the Null hypothesis be? E) Graph what the pattern of data might look like (you will be making up numbers here) IF the research hypothesis was found to be correct. 4. Appearance Change and witness responses – On your own Hypothesis: Suspects that have undergone high appearance change will lead to more foil identifications and false rejections in target present lineups. A) Identify the independent variable (IV)
B) Identify the dependent variable (DV) – what kind of data is it? C) Restate the hypothesis in terms of measures or comparisons of the IV relative to the DV D) What would the Null hypothesis be? E) Graph what the pattern of data might look like (you will be making up numbers here) IF the research hypothesis was found to be correct.
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