339 Chapter 2

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25 Terms

1

cohort

a generation of individuals who were born at about the same time, either in a particular year, or within a circumscribed time such as 5 years

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2

contextual metamodel

emphasizes both nature and nurture and that the organism and the environment are continually interacting

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3

cross-sectional research design

a type of research design in which you collect data from many different individuals at a single point in time

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4

descriptive approach

a research method that described the characteristics of the population or phenomenon studied

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5

ecological validity

whether the results obtained with a particular test instrument reflect real-world functioning or real-world behaviour

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6

experimental approach

involves manipulating one variable to determine if this causes changes in another variable

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7

external validity

refers to whether findings obtained from a sample of study participants can be generalized to the population of interest

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8

heterotypic continuity

refers to whether a measure used to assess an underlying characteristic has the same degree of internal validity for different age groups in a cross-sectional study, or for the same people as they are followed over time in a longitudinal study

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9

internal validity

refers to the accurate identification and interpretation of the factor(s), or effect(s), responsible for an observation

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10

life-span developmental perspectives

holds that patterns of change and transition occur throughout the working life

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11

longitudinal research design

the same individuals are followed over time and tested on two or more occasions

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12

mechanistic metamodel

uses a machine metaphor to study development

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13

mega-analytic approach

combines raw data across a variety of studies

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14

meta-analytic approach

synthesizes summary statistics obtained from a variety of individual studies, yielding a quantitative summary of findings

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15

multifactor research design

research with more than one categorical variable

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16

negative correlation

a relationship between 2 variables in which an increase in one variable is associated with a decrease in the other

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17

positive correlation

a relationship between 2 variables in which an increase in one variable is associated with a increase in the other

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18

quasi-experimental approach

a study with the same form as a true experiment but research participants are not randomly assigned to levels of a categorical factor

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19

reliability

the dependability or consistency of the instruments used to measure variables of interest

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20

selective attrition

the tendency of some people to be more likely to drop out of a study than others

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21

sequential research designs

include elements of both longitudinal and cross-sectional research designs

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22

single-factor research design

investigate the effect of one factor on the dependent variable

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23

time of measurement

conditions that prevail when the research is conducted

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24

time-lag research design

individuals of a particular chronological age are tested art two different times, usually years or decades apart

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25

validity

how well the results among the study participants represent true findings among similar individuals outside the study

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