There are thirty "keywords" for you to search for the type research service and data collection method you want.
You can search by the general descriptions QUALITATITIVE or QUANTITATIVE
Or you can use descriptions of more specific methods e.g. CATI; DEPTH; EXEC CON; GROUP; FIELDWORK; HALL; MYSTERY; OMNIBUS; POSTAL; RECRUITMENT etc.
Please note DATA PROCESSING and VIEWING FACILITIES are included in the Expertise Specialisms choices.