Lab, survey, field? Experiments provide control and the ability to randomize variables of interest. Researchers use these tools to deal with things like selection problems.
Places to do experiments
Harvard Decision Science Laboratory: Run no deception experiments with array of options including interactive computer games and physiological recordings during tasks.
Time Sharing Experiments for the Social Sciences (TESS): provides opportunities for social science data collection and discovery by increasing speed, precision and efficiency when applying scientific theory/analysis to critical social problems.
Software for conducting experiments
MediaLab: Stimulus/response and other options often used by psychologists.
z-Tree: Free software for interactive game experiments.
e-Prime: Stimulus/response and other options often used by psychologists.
Amazon Mechanical Turk: A website through which you can recruit workers for paid tasks. Helpful if you need participants for surveys, strategic games, experiments etc.
Experimental Turk: A blog on social science experiments using Amazon Mechanical Turk.
mturkr: A package to integrate Amazon Mechanical Turk and R.