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Muhammad Ibrahim Khalil
M.Phil. NUML University Islamabad
Def: A tool through which we collect data
The following stages are being elaborated below
Concept identification
 Identify and define construct
 Construct mapping
e.g. aggressive driving behavior
 Respondent.  Response to items
 Very aggressive driver  deliberately use vehicle to block
other drivers
 Aggressive driver  Yell insult  obscenities at drivers who
annoyed me
 Mildly aggressive drivers  Flash head lights when annoyed
by other drivers
 Least aggressive drivers  Mutter insult when annoyed by
other drivers
Item construction or general item pool
 Reflect purpose .
 Reflect entire construct
 Redundancy
 More items then intent to use
 Characteristic of well written items
 Reasonable reading level
 Clear or concise
 Avoid double barreled questions
 Avoid double negatives
Select response option format
 Binary
 Check all that rely
 Likert –style scale
 Multiple choice
 Open ended
 Thurston scale
 Number of response option
Expert review of items
 Confirm  invalidate definition of construct
 Item relevance to construct
 Item wording (clear, concise)
 Overlooked aspect
Consider validation items
 Quality of responses
 Social desirability
 personality driven Reponses biases
Construct validity
 Gold standard
 Theoretical relationship with construct
Administer items
 Collect data from development sample
 sample size matter
 Minimum sample size depend
Evaluate items
 Reverse scoring
 Item means
 item variances
 Item item correlation
 Item scale correlation
 Factor analysis
 coefficient alpha
Procedure and consideration (data collection)
 Before the final form of questionnaire, pilot study or
retest for validation
 Tabulate data from pilot testing
 Data will indicate whether answers can be satisfactory
 The retesting would indicate need for revision of
certain questions
 Help to delete unusual question
 Help to add some more new question
Distribution of questionnaire
 After retesting and revision , the questionnaire is ready
to distribute among respondents
 Two ways direct method or face to face , mailed
questionnaire
 Covering letter
 Confidentiality
 Data collection
 Thanks
 And good bye

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Process of instrument develoment

  • 1. Muhammad Ibrahim Khalil M.Phil. NUML University Islamabad
  • 2. Def: A tool through which we collect data The following stages are being elaborated below
  • 3. Concept identification  Identify and define construct  Construct mapping e.g. aggressive driving behavior
  • 4.  Respondent. Response to items  Very aggressive driver deliberately use vehicle to block other drivers  Aggressive driver Yell insult obscenities at drivers who annoyed me  Mildly aggressive drivers Flash head lights when annoyed by other drivers  Least aggressive drivers Mutter insult when annoyed by other drivers
  • 5. Item construction or general item pool  Reflect purpose .  Reflect entire construct  Redundancy  More items then intent to use  Characteristic of well written items  Reasonable reading level  Clear or concise  Avoid double barreled questions  Avoid double negatives
  • 6. Select response option format  Binary  Check all that rely  Likert –style scale  Multiple choice  Open ended  Thurston scale  Number of response option
  • 7. Expert review of items  Confirm invalidate definition of construct  Item relevance to construct  Item wording (clear, concise)  Overlooked aspect
  • 8. Consider validation items  Quality of responses  Social desirability  personality driven Reponses biases Construct validity  Gold standard  Theoretical relationship with construct
  • 9. Administer items  Collect data from development sample  sample size matter  Minimum sample size depend
  • 10. Evaluate items  Reverse scoring  Item means  item variances  Item item correlation  Item scale correlation  Factor analysis  coefficient alpha
  • 11. Procedure and consideration (data collection)  Before the final form of questionnaire, pilot study or retest for validation  Tabulate data from pilot testing  Data will indicate whether answers can be satisfactory  The retesting would indicate need for revision of certain questions  Help to delete unusual question  Help to add some more new question
  • 12. Distribution of questionnaire  After retesting and revision , the questionnaire is ready to distribute among respondents  Two ways direct method or face to face , mailed questionnaire  Covering letter  Confidentiality  Data collection
  • 13.  Thanks  And good bye