LECTURE 5 THE SURVEY: SAMPLING, QUESTIONNAIRE DISTRIBUTION AND INTERVIEWING

Co-lab

NJIT

LECTURE 5 THE SURVEY: SAMPLING, QUESTIONNAIRE DISTRIBUTION AND INTERVIEWING

CHARACTERISTICS OF A RANDOM SAMPLE

CHARACTERISTICS OF A RANDOM SAMPLE

PROBABILITY THEORY AND SAMPLING

PROBABILITY THEORY AND SAMPLING

PROBABILITY THEORY AND SAMPLING

THE PROCESS OF RANDOM SAMPLING

The SAMPLING FRAME

The SAMPLING FRAME

THE PROCESS OF RANDOM SAMPLING

SAMPLING ERROR

EXPECTED SAMPLING ERROR IS BASED ON THREE FACTORS:

EXPECTED SAMPLING ERROR

EXPECTED SAMPLING ERROR

SAMPLING ERROR:

CONFIDENCE LEVEL and CONFIDENCE INTERVAL.

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WHY are these sampling errors true?

RANDOM SAMPLING TECHNIQUES AND SAMPLING ERROR

THE SIMPLE RANDOM SAMPLE

SIMPLE RANDOM- SELECTION BY LOT

SIMPLE RANDOM- SELECTION BY LOT

SIMPLE RANDOM SAMPLES- BY RANDOM NUMBERS

SIMPLE RANDOM SAMPLES- BY RANDOM NUMBERS

A PARTIAL PAGE OF RANDOM DIGITS

SYSTEMATIC RANDOM SAMPLE: SELECTION AT INTERVALS ON A LIST.

3. Determine the SAMPLING INTERVAL, called "K"

SYSTEMATIC RANDOM SAMPLE: SELECTION AT INTERVALS ON A LIST.

Systematic Sampling

MULTI-STAGE RANDOM SAMPLES

TWO STAGE AREA SAMPLE

OTHER EXAMPLES of MULTI-STAGE SAMPLES:

Advantages of multi-stage sampling:

DISADVANTAGE OF MULTI- STAGE SAMPLING:

OTHER RANDOM SAMPLING METHODS

OPTIONS FOR QUESTIONNAIRE DISTRIBUTION

OPTIONS FOR QUESTIONNAIRE DISTRIBUTION

COMPUTER (self-administered)

INTERVIEWER ATTITUDES TOWARD COMPUTER-ASSISTED PERSONAL INTERVIEWING (CAPI)

CAPI and CATI

RESEARCH QUESTIONS:

SAMPLE

SAMPLE

STUDY DESIGN (LONGITUDINAL)

SCALES

RESULTS

RESULTS

RESULTS

THE UNSTRUCTURED OR FOCUSED INTERVIEW: A QUALITATIVE METHOD

SOME EXAMPLES OF USES OF UNSTRUCTURED INTERVIEWS:

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PROCEDURES FOR CONDUCTING UNSTRUCTURED INTERVIEWS

PROCEDURES

PROCEDURES FOR CONDUCTING UNSTRUCTURED INTERVIEWS

2. CONDUCTING THE INTERVIEW

2. CONDUCTING THE INTERVIEW:

2. CONDUCTING THE INTERVIEW:

2. CONDUCTING THE INTERVIEW:

OBTAINING THE INTERVIEW

The INTRODUCTION or PITCH: Explain:

"VOLUNTARY" PARTICIPATION

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"VOLUNTARY" PARTICIPATION

CONDUCTING THE INTERVIEW

CONDUCTING THE INTERVIEW

USING AN INTERVIEW GUIDE

Put on your "WAGS"

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ACCEPTANCE

ACCEPTANCE

GENUINENESS

SUPPORT

CONTROLLING THE INTERVIEW

Some types of non-directive probes:

PROBES

PROBES

4. ECHO OR NEAR REPETITION OF THE RESPONDENT'S WORDS

5. SUMMARIZING OR REFLECTING RESPONDENT EXPRESSIONS

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6. REQUESTS FOR SPECIFIC KINDS OF ADDITIONAL INFORMATION

7. REQUESTS FOR CLARIFICATION

REQUESTS FOR CLARIFICATION

8. REPETITION OF A PRIMARY QUESTION

RECORDING THE INTERVIEW

RECORDING THE INTERVIEW

THE WHOLE NOTES OF LECTURE 5