Classroom-based Research
Classroom-based research (CBR) refers to any systematic investigation conducted in actual classrooms rather than in laboratory settings. It encompasses a wide range of designs — experimental, quasi-experimental, qualitative, and mixed methods — united by the principle that research on language teaching and learning should take place where teaching and learning actually happen.
Why It Matters
The fundamental argument for CBR is Ecological Validity. Findings from laboratory studies — where participants process decontextualised sentences under controlled conditions — may not transfer to classrooms where learners interact with teachers, negotiate meaning, manage anxiety, and operate under time constraints. CBR sacrifices some control for authenticity.
The Control-Validity Trade-off
| Feature | Lab research | Classroom-based research |
|---|---|---|
| Control of variables | High | Low |
| Internal Validity | Strong | Threatened |
| Ecological Validity | Low | High |
| Generalisability to teaching | Uncertain | Direct |
| Replicability | Easier | Harder |
Common Approaches
- Quasi-Experimental Design — comparing intact classes receiving different treatments; the dominant quantitative CBR design
- Action Research — teachers investigating their own practice through plan-act-observe-reflect cycles (Burns, 1999, 2010)
- Classroom Ethnography — extended immersion in a classroom culture
- Classroom Discourse Analysis — analysing teacher-student and student-student interaction
- Classroom Observation — systematic observation using schedules (e.g., COLT, FLINT) or open-ended field notes
Challenges
- Lack of random assignment — intact classes create selection bias
- Teacher variability — different teachers in treatment and comparison groups introduce a confound
- Curriculum constraints — researchers cannot always control content, pacing, or assessment
- Hawthorne Effect — students and teachers may behave differently when observed
- Observer's Paradox — the presence of researchers or recording equipment alters classroom dynamics
- Small samples — individual classes rarely exceed 30 students, limiting statistical power
Bridging Research and Practice
CBR sits at the intersection of theory and practice. When teachers conduct their own classroom research (Action Research, Teacher Research), the gap between research findings and classroom application narrows. Allwright's (2003) Exploratory Practice framework argues that research should be integrated into normal classroom activity rather than imposed on it.
Key References
- Nunan (1992) — Research Methods in Language Learning
- Allwright & Bailey (1991) — Focus on the Language Classroom
- Allwright (2003) — Exploratory Practice
- Burns (2010) — Doing Action Research in English Language Teaching
- Mackey & Gass (2005) — Second Language Research: Methodology and Design