While the field of Artificial General Intelligence (AGI) continues to develop, it seems to be a need for continued progress in terms of developing AGI as a science. In this paper, we discuss scientific progress in AGI from the perspective of behavioral psychology. We provide examples of psychological experiments that seem potentially useful for AGI research. First, we show experiments that demonstrate various cognitive capabilities. Then, in line with contemporary behavioral psychology research, we examine how the terms coherence, complexity and levels of derivation can be used to study the dynamics of complex responding. Finally, we discuss experiments that are uniquely possible for AGI. Future implications for the AGI field are discussed.