WK 3 - Usability & Cognition 0.0 / 5 ? PsychologyVisual SystemUniversityAQA Created by: lizziespellerCreated on: 28-04-19 15:13 What is the definition of usability? The capability in human functional terms to be used easily & effectively by the specified range of users 1 of 22 Who created the LEAF criteria? Shackel 2 of 22 What are the four components of the LEAF criteria? Learnability, Effectiveness, Attitude & Flexibility 3 of 22 Who developed task analysis? Shepherd 4 of 22 What is the definition of task analysis? A behavioural analysis of the structure of tasks, often in terms of information processing 5 of 22 What is the definition of function allocation? A classic human factors method for deciding whether a particular function will be accomplished by a person, technology or a mix of both 6 of 22 In dynamic task allocation, what type of allocation can be customisable? Explicit allocation 7 of 22 In dynamic task allocation, what type of allocation can be made by a computer system? Implicit allocation 8 of 22 What is the definition of an outlier? A score very different from the rest of the data 9 of 22 What is the assumption of additivity & linearity? The relationship between the outcome variable & any predictors can be summed up in a straight line 10 of 22 Why do we need to look at the values of skewness & kurtosis? To check that the distribution of scores is approximately normal 11 of 22 What do positive values of skewness indicate? Too many low scores in a distribution 12 of 22 What do negative values of skewness indicate? A build up of high scores 13 of 22 What do positive values of kurtosis indicate? A pointy & heavy-tailed distribution 14 of 22 What do negative values of kurtosis indicate? A flat & light-tailed distribution 15 of 22 Significant tests of skew & kurtosis should not be used in what type of sample? Large samples 16 of 22 If the K-S scores are significant (sig below .05) what does this mean? The scores are significantly different from a normal distribution 17 of 22 What is the assumption of homogeneity of variance/homoscedasticity? The spread of outcome scores is roughly equal at different points of the predictor variable 18 of 22 There are four techniques which help reduce bias. What is the acronym for this? **** 19 of 22 What is the definition of winsorizing? Substitute outliers with the highest value that isn't an outlier 20 of 22 Out of the **** acronym, what is the best option to use when you have difficult data? Analyze with robust methods 21 of 22 What is the definition of a log transformation? Squashes the right tail of the distribution 22 of 22
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