pt 2 Flashcards
double blind vs single blind experiment
A double-blind study is one in which neither the participants nor the experimenters know who is receiving a particular treatment.
A participant in a single-blind study does not know which study group they are in, but the experimentor does.
control group
A control group is a group in the experiment which a variable is not being tested. eg. Nick completed an experiment to see how high ice cubes would float in normal temperatures of water. The control group would be at room temperature
placebo
A placebo is any treatment that has no active properties, such as a sugar pill. There are many clinical trials where a person who has taken the placebo instead of the active treatment has reported an improvement in symptoms. Belief in a treatment may be enough to change the course of a person’s physical illness.
personal error
an error introduced by the observer
systematic error
causes the measuremnets to be wrong by the same amount each time.
controlled variable
A control variable is anything that is held constant or limited in a research study. It’s a variable that is not of interest to the study’s objectives, but is controlled because it could influence the outcomes
theory vs a law
Generally, laws describe what will happen in a given situation as demonstrable by a mathematical equation, whereas theories describe how the phenomenon happens.
Random error
Random error causes one measurement to differ slightly from the next.
outlier
What is outlier in simple words?
An outlier is a single data point that goes far outside the average value of a group of statistics
extraneous vs cofounding
-extraneous variable is any variable that may effect the results. (Not the IV)
-cofounding variable are variables that have not been controlled in an experiment, therefore effecting the DV
error
An error is the difference between a measurement and the true value being measured.
