Experimentation process

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Flashcards on Experimentation process, created by dcardosods on 08/04/2015.
dcardosods
Flashcards by dcardosods, updated more than 1 year ago
dcardosods
Created by dcardosods over 10 years ago
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Question Answer
Hypothesis A suggested explanation of a phenomenon. Must be falsifiable. Should be specific, which makes it easier to test.
Independent variables Variable that are manipulated by experimenter.
Dependent variables Variable that are measured.
Variables relationship Manipulating independent variables is assumed to affect dependent variables results.
Null hypothesis When there is no relationship between manipulating independent variables and the result of dependent variables. When testing hypothesis, we are seeking to disproof it.
Control condition No experimental manipulations performed.
Experimental condition Experimental variable(s) are manipulated.
Validity What we say is being measured, is really what is being measured?
Reliability Running the experiment several times, do we get the same results every time?
Confounds Are there uncontrollable variables that might be influencing the results?
Subject pool Should represent the intended user population. Should not be biased.
Between-subjects Each subject experience only one condition. Needs more subjects. Do not suffer form "learn effect".
Within-subjects Every subject experiences every condition. Need fewer subjects. Order of conditions should be counterbalanced to minimize learning effects.
Subjects influence on results More subjects increase confidence of findings. Larger effects need less subjects to make it statically relevant. Smaller effects require subjects.
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