is a type of comparative scale where respondents are asked to sort between 60- 90 objects (usually) into piles according to some criteria. It is a useful technique for sorting relatively large numbers of objects quite quickly.

is the systematic study of participant viewpoints. 

The distance between the first and third sample quartiles. A formal Quality Assurance Department is essential to the consistent accuracy of research surveys.

Qualitative Research Consultants Association

is where a respondent is eligible to participate in the research study, but for some reason refuses or is unable to complete the study.

Respondents who have knowledge or experience of the subject matter are considered to be qualified survey respondents.

Qualifying Market Research Questions, which also might be known as screening questions, are used in market research to identify a potential respondent that can proceed with the research interview or survey.

Research conducted that cannot be quantified or analyzed quantitatively. Qualitative data requires subjective analysis as it is not collected empirically. Focus groups, interviews, and open-ended questions are all forms of qualitative research.

The individual responsible for greeting the focus participants as they arrive at the facility and for preparing the room. 

Qualitative research is about finding out not just what people think, but why they think it. It's about getting people to talk about their opinions so you can understand their motivations and feelings. Face-to-face interviews and group discussions are the best way to get this kind of in-depth feedback.

It involves the use of unstructured exploratory techniques (such as group discussions and in-depth interviews) that are based on statistically small samples in order to understand a problem further.

to classify data with respect to certain characteristics and make decisions about which elements are most similar and most different.

refers to a set of procedures to ensure that interviewers follow the instructions provided by the sampling plan

involves the collection of (statistically) large samples of quantitative data and usually some form of statistical analysis. Quantitative research is often used to substantiate the findings from qualitative research.

A result that cannot be quantified but rather belongs to a category or classification. Marital status, sex, and occupation are examples.

A quartile is a statistical term that describes a division of observations into four defined intervals based on the values of the data and how they compare to the entire set of observations.

It is a type of experimental design that applies some but not all of the procedures of a true experiment and lacks full experimental control. Examples of quasi-experimental designs are time series and multiple time series.

A query is a question or phrase used to gain and validate information. Digital marketing uses a query to refer to the string of words entered into a search engine's search box.

a structured technique for collecting data consisting of a series of questions. Questionnaires can be self-completion or administered by an interviewer, they can be completed orally or in writing.

is the process of asking questions and recording the answers. A self-administered questionnaire is completed by the respondent and not administered by an interviewer.

are a set of four values that divide the total frequency into five equal parts.

is the total number of interviews to be completed by a data collection company. Quotas may also be defined by market, by product, by interviewer or by rotation etc.

is a type of non-probability sample where the required numbers of units with particular characteristics are specified.

is a form used to track completed interviews in a study. It is normally used by the supervisor.