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Across 4. In an interview or questionnaire, questions that invite the respondent to provide their own answer rather than select one of those provided 5. A type of graph used to represent the frequency of data: ____ chart 6. _________ groups is the type of experimental design where there are two groups of participants and each group takes part in just one condition 8. Predicts the kind of difference (e.g. more or less) between two groups of participants or between different conditions: __________ hypothesis 13. The kind of data that best expresses what people think or feel, and cannot be counted 14. In a repeated measures design, a confounding variable arising from the sequence in which conditions are presented e.g. a practice or boredom: ________ effect 15. In an experiment, the variable that is manipulated by the experimenter (initials) 17. A measure of dispersion that measures the difference between the highest and lowest score in a set of data 18. A sampling technique which relies solely on people who offer to participate, usually in response to an advertisement 20. A measure of consistency within a set of scores or items, and over time such that it is possible to obtain the same results on subsequent occasions when the measure is used 21. The middle value in a set of scores when they are placed in rank order

Down 1. Data which represent how much or how long, or how many etc. there are of something 2. The average of a group of scores , calculated by dividing the sum of the scores by the number of scores 3. The most frequently occurring score in a set of data 7. In an experiment, the variable that is measured by the experimenter (initials) 9. A research method that involves face to face interaction with another individual and results in the collection of data 10. A technique for sampling where people are selected who are most easily available 11. A graphical representation of the relationship between two sets of scores 12. A small scale trial run of a study to test any aspects of the design, ________ study 16. ________ blind is a research design where neither the participant nor the experimenter is aware of the condition that an individual participant is receiving 19. A technique for selecting participants such that every member of the population being tested has an equal chance of being selected