How mental states shape speed and effort are analyzed in a landmark lab study.
This book presents early work from a hospital laboratory that compares normal, depressed, and exhilarated individuals. Through careful tasks and weeks of testing, it shows how emotion, motivation, and bodily action can alter thinking speed, attention, and performance.
The study uses real subjects and systematic measurements to map the differences between phases of excitement and retardation. It includes tapping tests, adding problems, and discrimination tasks, all designed to track how quickly and accurately people respond under varying mental states. The narrative also notes how practice and recovery influence outcomes over time.
- A detailed look at how researchers measure reaction time, accuracy, and speed across different tasks.
- Observations on how depressed and excited states affect motivation, memory, and movement.
- Discussion of long-term changes, practice effects, and the role of recovery in performance.
- First-hand descriptions of experimental setups, including subject groups and the progression of tests over weeks.
Ideal for readers interested in the history of clinical psychology, neuroscience, and how early researchers quantified mental processes.