# chapter 2 research method flashcards

Flashcards by jmmckeithan, updated more than 1 year ago
 Created by jmmckeithan over 5 years ago
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vocab

## Resource summary

 Question Answer Ethical Principles for animal research Research must have a clear , scientific purpose Standard deviation shows how far scores vary from the mean ( average) score 68-95-99.7 rule means 68% of all scores fall within one standard deviation of the mean (average ) Approx. 95% off all scores fall within two standrad deviations of the mean 99.7% Normal Distribution forms a bell shaped or symmetrical curve( upside down U) Mode the most frequently occuring score Median the middle score , score that divides a frequency distribution excatly in half Mean the average , sum of a set of scores divide by the number of scores operational definitioins statement of ypour procedures , identifies the iv & dv, sampling and assignment Dependent variable what is being measured in an experiment , the research variable that " depends" on the independent variable Random assignment Assigning participants to experimental and control groups by chance cross sectional study compares individuals at various ages at one point in time. Longitudinal study studies a single individual or a group over an extended period of time zero correlation indicates there is no nrelationship between 2 variables negative correlation -1.00 closest to it , means 2 variables move in the opposite direction positive correlation +1.00 closest to it , mean 2 variables move in the same direction correlation coefficient a number value that indicates the strenghth and direction of the relationship between two variables c researhers observe or measure a relationship between variables participants bias tendency for research participants to respond in a certain way because they know they are being observed researcher bias tendency for researchers to look for evidence that supports their hypothesis and ignore contradictory evidence surveys descriptive method , uses questionnaries or interviews skewed distribution distrubition with most scores squeezed to one end , few scores stretch out like tail Reliability consistency or repeatability of results . random selection choosing of members of a population so that every individual has an equal chance of being chosen for a sample random assignment division of the sample in an experiment into groups so that every individual has an equal chance of being put in any group quasi- experiment measurment of dv ( dependent variable ) when random assignment to groups of a randomly selected sample is not possible Quantitative Data Information can be reported as numbers for ease of handling. Placebo distributed through population . Ex. sat Normal Distribution Represented by a normal curve ( upside down U shape ) symmetric with mean, mode , and median the same score Naturalistic Observations Observing and recording behavior in naturally occuring situations w/o trying to manipulate and conrol situation Inferential statistics statistics used to interpret data and draw conclusions Hypothesis Prediction of how 2 or more factors are likely to be related Experimental group group that you experimenting on receives the independent variables Experiment Research method that involves manipulation of an independent variable Ethical guidlines for human research 10 informed consent Descriptive statistics numbers that summarize a set of research data from a sample Confounding variable Factors that cause differences between the experimental group and the control group other than the independent variable Central Tendency Describes average of a distribution Case studies research technique in which one person is studied in depth in hope of revealing universal principles

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