# Psyc 255 Last Exam

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amwages's
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2017-12-04 15:54

## Section 1

Question | Answer |
---|---|

factorial designs | designs with more than one independent variable |

main effect | information about the effect of each independent variable taken by itself |

interaction | if there is an interaction between two independent variable, the effect of one independent variable depends on the particular level of the other variable |

analysis of variance | used to assess the statistical significance of the main effects and the interaction in a factorial design |

simple main effects | examines mean difference at each level of the independent variable |

mixed factorial design | combination of independent and repeated measures designs |

independent groups (between-subjects) design | different group of participants will be assigned to each of the four conditions |

repeated measures (within-subjects) design | the same individuals will participate in all conditions |

## Section 2

Question | Answer |
---|---|

single-case experimental designs | have traditionally been called single-subject designs |

reversal designs | ABA |

multiple baseline design | the effectiveness of the treatment is demonstrated when a behavior changes only after the manipulation is introduced |

quasi-experimental designs | address the need to study the effect of an independent variable in settings in which the control features of true experimental designs cannot be achieved |

one-group posttest-only design | lacks crucial element of a true experiment:a control or comparison group |

## Section 3

Question | Answer |
---|---|

history effects | caused by any confounding event that occurs at the same time as the experimental manipulation |

maturation | any changes that occur systematically over time |

testing | testing becomes a problem if simply taking the pretest changes the participant's behavior |

instrument decay | basic characteristics of the measuring instrument change over time |

regression toward the mean | likely to occur whenever participants are selected because they score extremely high or low on some type of variable |

nonequivalent control group design- | employs a separate control group, but participants in the two conditions-the experimental group and the control group- are not equivalent |

nonequivalent control group pretest-posttest design | one of the most useful quasi-experimental designs |

propensity score | advances in statistical methods have made it possible to simultaneously atch indivudals on multiple variable |

## Section 4

Question | Answer |
---|---|

cross-sectional method | persons of different ages are studied at only one point in time |

longitudinal method | same group of people are observed at different points in time as they grow older |

sequential method | compromise between the longitudinal and cross-sectional methods |

cohort | a group of people born at about the same time |

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