ESOL Lab School
 Portland State University Department of Applied Linguistics 
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Introduction to Data Collection Methods  
There are three main data collection methods used at the Lab School. They are the Multimedia Adult English Learner Corpus, the Labsite Student Study and Educational Experiments.
Multimedia Adult English Learner Corpus (MAELC)
Digital audio and video recording of all the ESOL classes in the Lab School makes it possible to conduct in-depth classroom research on second language acquisition and pedagogy. Along with the accompanying transcriptions and classroom coding, the digital recordings will be available for corpus analysis for many years. Material drawn from these annotated classroom recordings will be used in professional development materials.
Labsite Student Study
The progress of ESOL students is followed for up to four years regardless of whether or not they stay in the lab school classes. Students are interviewed in their homes in their native languages and in English as their proficiency allows. Interviewers conduct periodic oral and written language assessments. The Labsite Student Study will be able to describe individual long-term learning outcomes.
Educational Experiment
Students at each ESOL level are assigned to one of two classes offered at the same time and at the same location. This random assignment allows for comparison of experimental and control groups/classrooms. In this way, research in the Lab School can demonstrate the relative effectiveness of different instructional approaches and curricula.


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