Conceptual approaches and issues.

Parrott (1984) wrote a think-piece, not an experiment. The paper tells behavior analysts to stop hiding from tough topics like memory, problem solving, and language.

The author warns that if we only study bar-pressing rats, other sciences will leave us behind.

There is no new data. The finding is a warning: expand or become irrelevant.

The paper says we must train students to study complex human behavior and must chase those questions now.

Hobson (1987) picks up the same rally cry but moves the goal posts. Instead of cognition, it tells us to tackle big social problems like poverty and politics.

Saunders et al. (2005) later pushes the same expansion idea even further, urging large public-health scale projects instead of single-case studies.

Lord et al. (1986) sounds a caution note. It reminds us to keep mentalistic language out of our explanations even while we study fancier behaviors.

If you supervise students, show them this chain of papers. Let them see the field’s growth arc: first ask harder cognitive questions, then aim at social issues, then scale to whole populations. Use it to justify a thesis on verbal behavior or community interventions. The thread gives you historical cover when reviewers say ‘that’s not traditional ABA.’