Presentation on theme: "MEASUREMENT IN MARKETING RESEARCH"— Presentation transcript:
1MEASUREMENT IN MARKETING RESEARCH CHAPTER 10MEASUREMENT IN MARKETING RESEARCH
2Important Topics of This Chapter Basic types question-response format.Consideration of choosing a question response-format.Measurement and scale characteristics in a question-response format.Levels of measurement of scales.Various types scaled-response question formats.Reliability and validity of measurements.
3The Questionnaire’s “Position” in the Research Process SurveyObjectivesRespondent’sInformationQuestionnaireDataAnalysisFindingsRecommendationsManagerialAction
4Criteria for a Good Questionnaire To design a good questionnaire, the following issues should be considered:Does it Provide the Necessary Decision-Making Information?Does it Consider the Respondent?
5Basic Question-Response Format EditingRefers to going through the questionnaire to make certain the “skip patterns” are followed and required questions are filled out.A skip pattern is the sequence in which questions are asked.Open-Ended Response Format Questions:An open-ended question is one that does not contain prerecorded possible responses:Un-probed format:Seeks no additional information from respondents.Probed format:Researcher may ask comments or statement from the respondents.Response format:Researcher may ask additional information.
6Basic Question-Response Format (cont.) Closed-Ended Response Format Questions:Dichotomous closed-ended questions:Yes/No options.Multiple category closed-ended questions:They are very popular question style.Scaled-response Questions:Un-labeled scaled-response format:Purely numerical or only endpoints are identified.Labeled scaled-response format:All of the scaled position are identified.
7Considerations in Choosing A Questions Response Format Nature of property being measured:Different type of question format must be used.Previous research studies:Questionnaires may be used with permission.Data collection mode:Mail, telephone, personal/computer interviews.Ability of the respondents:Previous research experiences may help.Scale level desired:3, or 5, or 7 points scales.
8Basic Concepts in Measurement Objects:Consumers, brands, stores, advertisements.Properties:Demographic characteristics.Objective properties:Physically verifiable.Subjective properties:Cannot be directly observed, such as person’s attitude and intentions.
9Scale Characteristics Description:Agree/Disagree, Approve/DisapproveOrder:Size of the descriptor .Distance:Two cars Vs. one car family.Origin:0 or 1.
10Primary Scales of Measurement Nominal NumbersAssignedto RunnersOrdinal Rank Orderof WinnersInterval PerformanceRating on a0 to 10 ScaleRatio Time to Finish, inSeconds78Finish3ThirdplaceSecondplaceFirstplaceFinish184.108.40.206220.127.116.11
12A Classification of Scaling Techniques Comparative ScalesNon-comparativeScalesContinuous Rating ScalesItemized Rating ScalesPaired ComparisonRank OrderConstant SumQ-Sort and Other ProceduresSemantic DifferentialStapelLikert
13Attitude Scales Scaling Defined: The term scaling refers to procedures for attempting to determine quantitative measures of subjective and sometimes abstract concepts. It is defined as a procedure for the assignment of numbers to a property of objects in order to impart some of the characteristics of numbers to the properties in question.
14Unidimensional and Multidimensional Scaling Unidimensional ScalingMultidimensional ScalingProcedures designed to measure several dimensions of a respondent or objectProcedures designed to measure only one attribute of a respondent or object
15Different Type of Scales Graphic Rating Scale:Present respondents with a graphic continuum typically anchored by two extremes.Itemized Rating Scale:Itemized rating scales are very similar to graphic rating scales, except that respondents must select from a limited number of ordered categories rather than placing a check mark on a continuous scale.Rank-Order Scale:Itemized and graphic scales are non-comparative because the respondent makes a judgment without reference to another object, concept, or person. Rank-order scales, on the other hand, are comparative because the respondent is asked to judge one item against another.
16Different Type of Scales (cont.) Q-Sorting:Q-Sorting is basically a sophisticated form of rank ordering. A set of objects - verbal statements, slogans, product features, potential customer services, and so forth - is given to an individual to sort into piles according to specific rating categories.Paired Comparison:Paired comparison scales ask a respondent to pick one of two objects from a set based upon some stated criteria.
17Different Type of Scales (cont.) Constant Sum Scales:Constant sum scales are used more often by market researchers than paired comparisons because the long list of paired items is avoided.This technique requires the respondent to divide a given number of points, typically 100, among two or more attributes based on their importance to the persons.
18Different Type of Scales (cont.) Semantic Differential Scale:The construction of the semantic differential scale begins with the determination of a concept to be rated. The researcher selects dichotomous pairs of words or phrases that could be used to describe the concept. Respondents then rate the concept on a scale. The mean of these responses for each pair of adjectives is computed and plotted as a “profile” or image.Stapel Scale:The Stapel scale is a modification of the semantic differential. A single adjective is placed at the center of the scale. Typically it is designed as a 10-point scale ranging from +5 to -5. The technique is designed to measure both the direction and intensity of attitudes simultaneously.
19Different Type of Scales (cont.) Likert Scale:The Likert scale consists of a series of statements that express either a favorable or an unfavorable attitude toward the concept under study.Purchase Intent Scale:Scale designed to measure the likelihood that a potential customer will purchase a product or service.
20Some Basic Considerations When Selecting a Scale Selecting a Rating, Ranking, Sorting, or Purchase Intent ScaleOdd or Even Number of Scale CategoriesNumber of CategoriesForced Versus Non-forced ChoiceBalanced Versus Non-balanced Alternatives
21Approaches to Identifying Determinant Attitudes DirectQuestioningIndirectQuestioningObservation
22Obtaining Shampoo Preferences Using Paired Comparisons Instructions: We are going to present you with ten pairs of shampoo brands. For each pair, please indicate which one of the two brands of shampoo you would prefer for personal use Recording Form:aA 1 in a particular box means that the brand in that column was preferred over the brand in the corresponding row. A 0 means that the row brand was preferred over the column brand. bThe number of times a brand was preferred is obtained by summing the 1s in each column.
23Paired Comparison Scaling The most common method of taste testing is paired comparison. The consumer is asked to sample two different products and select the one with the most appealing taste. The test is done in private and a minimum of 1,000 responses is considered an adequate sample. A blind taste test for a soft drink, where imagery, self-perception and brand reputation are very important factors in the consumer’s purchasing decision, may not be a good indicator of performance in the marketplace. The introduction of New Coke illustrates this point. New Coke was heavily favored in blind paired comparison taste tests, but its introduction was less than successful, because image plays a major role in the purchase of Coke.A paired comparison taste test
24Preference for Toothpaste Brands Using Rank Order Scaling Instructions: Rank the various brands of toothpaste in order of preference. Begin by picking out the one brand that you like most and assign it a number 1. Then find the second most preferred brand and assign it a number 2. Continue this procedure until you have ranked all the brands of toothpaste in order of preference. The least preferred brand should be assigned a rank of 10.No two brands should receive the same rank number.The criterion of preference is entirely up to you. There is no right or wrong answer. Just try to be consistent.
25Brand Rank Order1. Crest _________2. Colgate _________3. Aim _________4. Gleem _________5. Macleans _________6. Ultra Brite _________7. Close Up _________8. Pepsodent _________9. Plus White _________10. Stripe _________
26Importance of Toilet Soap Attributes Using a Constant Sum Scale InstructionsOn the next slide are eight attributes of bathing soaps. Please allocate 100 points among the attributes so that your allocation reflects the relative importance you attach to each attribute. The more points an attribute receives, the more important the attribute is. If an attribute is not at all important, assign it zero points. If an attribute is twice as important as some other attribute, it should receive twice as many points.
27Average Responses of Three Segments Attribute Segment I Segment II Segment III 1. Mildness2. Lather3. Shrinkage4. Price5. Fragrance6. Packaging7. Moisturizing8. Cleaning PowerSum
30Balanced and Unbalanced Scales Jovan Musk for Men is Jovan Musk for Men is Extremely good Extremely good Very good Very good Good Good Bad Somewhat goodVery bad Bad Extremely bad Very badBalanced ScaleUnbalanced Scale
31Rating Scale Configurations A variety of scale configurations may be employed to measure the gentleness of Cheer detergent. Some examples include: Cheer detergent is: ) Very harsh Very gentle2) Very harsh Very gentle3) . Very harsh.. Neither harsh nor gentle. Very gentle ) ____ ____ ____ ____ ____ ____ ____Very Somewhat Neither harsh Somewhat Gentle Veryharsh Harsh harsh nor gentle gentle gentle5)Very Neither harsh Veryharsh nor gentle gentleCheer-3-2-1+1+2+3
32Some Unique Rating Scale Configurations Thermometer Scale Instructions: Please indicate how much you like McDonald’s hamburgers by coloring in the thermometer. Start at the bottom and color up to the temperature level that best indicates how strong your preference is.Form:Smiling Face Scale Instructions: Please point to the face that shows how much you like the Barbie Doll. If you do not like the Barbie Doll at all, you would point to Face 1. If you liked it very much, you would point to Face 5.Like very muchDislike very much
33Summary of Itemized Scale Decisions Table 9.21) Number of Categories Although there is no single, optimal number, traditional guidelines suggest that there should be between five and nine categories ) Balanced vs. unbalanced In general, the scale should be balanced to obtain objective data ) Odd/ even no. of categories If a neutral or indifferent scale response is possible from at least some of the respondents, an odd number of categories should be used ) Forced vs. non-forced In situations where the respondents are expected to have no opinion, the accuracy of the data may be improved by a non-forced scale ) Verbal description An argument can be made for labeling all or many scale categories. The category descriptions should be located as close to the response categories aspossible6) Physical form A number of options should be tried and the best selected
34Reliability of Measurements Scale EvaluationReliabilityValidityGeneralizabilityTest/ RetestAlternative FormsInternal ConsistencyContentCriterionConstructConvergentDiscriminantNomological
35Potential Sources of Error on Measurement 1) Other relatively stable characteristics of the individual that influence the test score, such as intelligence, social desirability, and education.2) Short-term or transient personal factors, such as health, emotions, fatigue.3) Situational factors, such as the presence of other people, noise, and distractions.4) Sampling of items included in the scale: addition, deletion, or changes in the scale items.5) Lack of clarity of the scale, including the instructions or the items themselves.6) Mechanical factors, such as poor printing, overcrowding items in the questionnaire, and poor design.7) Administration of the scale, such as differences among interviewers.8) Analysis factors, such as differences in scoring and statistical analysis.