# 14 the extent to which the measurement appears to be

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Chapter 1 / Exercise 14
Childhood: Voyages in Development
Rathus
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14) • The extent to which the measurement appears to be a plausible measure of the variable - Does it make intuitive sense? Would others agree? EX: you got pitbull as a type of dog wherever or not it make sense just by watching it appears to be pausible 2. Concurrent Validity 15) • The extent to which the measurement relates to other measures of the same thing - Does it correlate with other (established) tests or measures? - ex : is there a correlation between the established test and the new test If the IQ test is valid and you did a test similar then it should be measuring the same thing an be valid 3. Predictive Validity 16) • The strength of the relationship between two things - Can you use one to predict the other? - ex : GRE one exam , a world of opportunity we use our mesurment to mesure something else. The exam GRE in order to go in Grade school. but alot of progam took use the GRE to know if students are accepted or not. 4. Construct Validity 17) • The type of validity demonstrated when scores obtained from a measurement behave exactly the same as the variable itself - Does the scale or test measure our construct adequately? overall validity of what your measuring. we are never completely sure since it’s ongoing. 5. Convergent & Divergent Validity 18) Convergent validity involves demonstrating a strong relationship between two different methods for measuring the same construct convergent: strong correlation between 2 different methods ex: happiness but at the same time is measuring optimism Divergent validity involves demonstrating little or no relationship between the measurements of two different constructs divergent : ex: if the expect happiness score to not be similar to depression score. Reliability and Validity 19) • A test can be reliable, but not valid • Reliability is a prerequisite for validity • A measure may be valid for one purpose, but not for another
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Chapter 1 / Exercise 14
Childhood: Voyages in Development
Rathus
Expert Verified
ex: reliable but not valid , reliable and valid or unreliable and hence not valid reliability : consistency come 1st validy: accurity comme 2nd Validity in a Study 21)What about the overall research study?
2. A study has external validity if we can generalize the results Internal Validity 23) Internal validity depends on appropriate contro l of other variables (confounding factors) - Are there any alternative explanations for the relationship between the two variables? - Any factor that allows an alternative explanation for the results is a threat to internal validity 24) Internal validity • Extraneous variables • Confounding variables 26) Extraneous variables are only a problem when they become confounding variables - We can never completely get rid of extraneous variables, so we need to choose which are the most important to control extraneous variables :are always here but the only problem is when they are