IA: The data collection tool
For Criterion C, students are required to create “an appropriate and effective data collection tool” to investigate the issue they have identified within their population of interest. But what exactly makes a data collection tool appropriate and effective? This blog post explores what these terms mean and how they apply to different research methods.
What is an appropriate data collection tool?
To be appropriate, the data collection tool should match both the population of interest and the chosen research method. For example, if the population of interest consists of older adults with limited computer skills, semi-structured interviews may be more appropriate than online questionnaires.
In this case, the data collection tool would consist of the interview questions. These should avoid leading language and be primarily open-ended, allowing participants to elaborate on their responses and provide detailed information. Although the IB requires a minimum of five questions, students should avoid including too many additional questions. A semi-structured interview lasting approximately 30 minutes should provide sufficient time to explore participants' responses in depth.
These considerations help ensure the data collection tool is appropriate for both the characteristics of the population and the requirements of the research method.
More examples are here:
| Population of interest and topic | Method | Behaviour-targeted data collection tool |
| Young children - how they engage in collaborative play. | Observation at a kindergarten | An observation chart designed to record data using frequency recording, time sampling, event sampling, or a sociogram, accompanied by the researcher's notes. |
| Single parents - the relationship between single parenting and stress. | Online questionnaire | A combination of open-ended and closed-ended questions, which may include Likert-type scales and multiple-choice questions. |
| Students - the influence of technology on learning. | In-class experiment | A questionnaire designed to measure the dependent variable. |
What is an effective data collection tool?
To be effective, the tool has to measure the behaviour or issue that it is supposed to be measuring. The variables should be operationalised carefully. For example, if the kindergarten observation is measuring collaborative play, then what is meant by “collaborative” and what is meant by “play” must be decided and listed:
- Collaborative could be defined as two or more children playing together with shared goals, rather than playing side‑by‑side or loosely interacting.
- Play is more than just chatting (unless in a specific role play) or sitting quietly with friends. It is a joint imaginative and creative activity characterised by engagement with others.
The next step is for the student to decide if they want to propose measuring how often children play collaboratively, or for how long they are engaged with others in play, or how often they change play partners or in what type of play they engage. This should relate back to their aim or research question. It will affect the type of chart they construct to measure behaviour.
Variable being measured | Proposal for an effective way to measure this |
| The frequency with which a child engages in collaborative play. The proposal may specify that a different child will be observed during each session. | A frequency tally chart used to record the number of times the child engages in collaborative play with others. |
| How long they are engaged in play together. | Timings recorded for a particular child or group of children |
| How often they change play partners. | A frequency tally chart could also be used. However, if the observation involves considerable movement and multiple researchers, a sociogram may be more appropriate for recording patterns of social interaction. See this page for an explanation of sociograms. |
| Different types of play. | Event sampling involves recording each occurrence of a specific, predefined behaviour or event. In this case, it is important to distinguish between changes in play partners and changes in the type of play, as children may spontaneously engage in a different type of play while remaining within the same group. |
It is possible to propose measuring more than one of these variables, but to be effective, the proposed tool should stay focused on the aim or research question. See the research methodology and data collection sections on this page.
Data collection tools used in naturalistic observations do not necessarily require predetermined categories. In more exploratory, inductive research, themes may emerge during the subsequent analysis of the researcher's observational notes. However, observations should still remain focused on the aim and research question to ensure that the data collected are relevant.