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Educational Inquiry

by: Burdette Lang

Educational Inquiry CEP 930

Burdette Lang
GPA 3.72


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Class Notes
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This 2 page Class Notes was uploaded by Burdette Lang on Saturday September 19, 2015. The Class Notes belongs to CEP 930 at Michigan State University taught by Staff in Fall. Since its upload, it has received 64 views. For similar materials see /class/207235/cep-930-michigan-state-university in Human Dev And Family Sciences at Michigan State University.


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Date Created: 09/19/15
Notes on Measurement in Field Settings from An Introduction to Community Experimentation Scott E Schopieray September 19 2001 There are at least three ways in which measurement devices can vary 1 The extent to which they directly measure a phenomenon a Directness is a characteristic of particular methods of assessment and a characteristic of what is being measured 2 The degree to which they are passive observations of a phenomenon rather than active interventions a Ex Telescopes have little if any effect on the stars but bringing a lm crew into a house will have an effect on the family 3 The extent to which they are intended to re ect a part of the phenomena in question or whether they re ect all phenomena a Ex Grades in a given class can be used or entire gpa can be used The goals of systematic measurement in the social sciences are fourfold Systematic measurement must elevate information collection beyond the level of opinion systematic measurement devices serve to codify information into a common language which enhances the replicablility of the information 3 Measurement devices often produce a specific type of code namely numbers Translating the info resulting from observation to nums allows easy use of the data for statistical analysis 4 Compress information N Measurement scales used by community researchers include the following Nominal Scales 7 names or labels places things and events and presents information in a dichotomous fashion Indicate membership and exclusivity Ordinal Scales 7 adds a level of complexity to the nominal scale Indicates info concerning differences among them too Indicates differences as points on a continuum of a less than equal to or more than quality Interval Scales 7 indicate class membership relative position of the classes and make assumptions about the distance between the classes Ratio Scale 7 satisfies all qualifications of interval scales and adds the characteristic of an absolute zero point There is an observable absence of the property measured by this scale and this position on the scale is a real zero point DATA QUALITY Reliability indicates its replicability and reproducibility Validity refers to the accuracy of the meaning of the data produced Reliability Various types of reliability interest the experimenter Testretest reliability 7 same results can be reproduced Interrater reliability 7 holds everything constant except the observer or administrator Internal Consistency 7 examines the consistency of data when using several different items comprising a scale Validity Content Validity 7 extent to which a measurement device covers the domain of the phenomena adequately and reasonably Criterion Validity 7 addresses the extent to which a particular measure produces information consistent with a second measure of the same phenomena Outcome validity 7 in most situations there is an outcome variable which is of major social significance METHODS OF MEASUREMENT Personal Histories Diaries Log Notes Primary concern for data quality rests in consistency over time observer and method One of the most unstructured methods Critical Events Investigator keeping track of important events that occur during the course of the experiment Capturing critical happenings which may affect the course of the social model under investigation or the actual execution of the study itself is a major concern Agreement among different members of the investigating team is the most often used source of consistency Interviews Interviews occur when two people sit down and talk to each other about a phenomenon Most data consistency techniques can be used with interview data Archival or Record Data


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