Class Notes (837,550)
Canada (510,314)
Sociology (2,430)
SOCB05H3 (99)
Lecture

LECTURE NOTES SEPTEMBER 27 2012

4 Pages
54 Views
Unlock Document

Department
Sociology
Course
SOCB05H3
Professor
Rania Salem
Semester
Fall

Description
SEPTEMBER 27 2012 (LECTURE):  TA [email protected]  Composite measures a series of items which try to do 2 things. o Try to capture different dimensions of concepts o Capture the different manifestations of a dimension  2 different types of composite measures: o Indexes  consists of survey questions. Points for the questions are accumulated and assigned to different items. Points at the end, result in the assign responses o Scales  assign scores to patters of responses, they usually recognize some responses reflect the concept weakly and others strongly  STEP 1 IN CONSTRUCTING AN INDEX o FACE VALIDITY  common sense of correspondence of the item and the view on the topic o UNI-DIMENSIONALITY items that don’t have to do with the topic o VARIANCE certain item against that topic wont help the survey because it will result in zero responses to that particularly question.  STEP 2 EXAMINE THE EMPIRICAL RELATIONSHIP o Answer to one item in the survey, should help us see how the other questions will be answered  If this isn’t possible, the index has a problem  STEP 3 ASSIGNING SCORES TO THE INDEX ITEMS  STEP 4 INDEX VALIDATION o Internal (item analysis) taking out extra questions which might be similar but at the same time still being able to have a proper index o External relate aspects of the measures. Having “abortion behaviour” in an “abortion” survey works. It wont work with “homo”  In scale, the items are ranked. Opposite of index  Scaling method: lickert scaling o Check what percentage of the responses for an items would get a yes in the index o Strongly approved to strongly disagreeing  probability sampling: key terms: o Population  the theoretically specified elements of a study o Sample  the elements of a population actually selected for observation in a study o Representative sample  a sample that contains the same distribution of characteristics that exist in the population o Sampling frame  list of elements from which a probability sample is selected  Defining two main sampling techniques in survey research o Sampling  process of selecting items o Probability sampling  sampling based on a process of random selection that gives each case in the population an equal or known chance of being included in the sample o Non-probability sampling  sampling based on a process other than random selection  Probability sampling designs multistage cluster sampling o Within each cluster, elements can be selected using random, systematic, or stratified sampling o How should clusters be sampled> probability proportionate to size  Non-probability sampling designs: reliance on available subjects o Select a number of cases from those what are conveniently available  Non-probability sampling designs: purposive sampling o Use judgement to select units that are representative or typical of the population  Non-probability sampling design: snowball sampling o Collect data on a few members of the target population that are easily located o Ask those cases to refer you to other members of target population; and so forth  EXAMPLE prostution making the law for them better for their own safety o Sampling  non- probability because its hard to find them and there is no directory for them o Method snowball o Population  prostitutes o Sample  narrow it down to the location you are in. 20 Toronto SEPTEMBER 27 2012 (CHAPTER 6 & 7):  The terms index and scale are typically used imprecisely and interchangeably in social research literature  Both scales and indexes are ordinal measures of variables such as religiosity, alienation, socioeconomic status, prejudice, or intellectual sophistication  Both scales and indexes are composite measures of variables o That is measurements based on more than one data item  An index is constructed by simply accumulated scores assigned to individual indicators  A scale, is constructed by assigning scores to patterns of responses, recognizing that some items reflect a relatively weak degree of the variable while others reflect something stronger o Scales are generally superior to indexes, because scales take into consideration the intensity with which different items reflect the variable being measured  4 main steps in the construction of index 
More Less

Related notes for SOCB05H3

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit