Chronoscope (Simple reaction time)

The term chronoscope (from the Greek chronos, meaning “time,” and skopos, meaning “observer”)

1. Simple Reaction Time (Visual and Audio) (Chronoscope) Dr Rajesh Verma Assistant Professor in Psychology Govt. College Adampur, Hisar (Haryana) 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana

2. Brief Introduction The term chronoscope (from the Greek chronos , meaning “time,” and skopos , meaning “observer”). An instrument that measures small intervals of time (Merriam Webster) or an optical instrument used to measure very small time intervals with precision (wiktionary.org). http://vlp.mpiwg-berlin.mpg.de/essays/data/enc13?p=2 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana

3. Chronoscope was invented by English scientist around 1840 and later German clock maker and mechanic Mattha¨us Hipp around 1850. In 1874 Wilhelm Wundt recommended chronoscope for experimental psychology. Courtesy: khodiyarlab.com 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana

4. Apparatus type Electrical Link for Reaction time video – https://youtu.be/FL-wpF9IOoo 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana

5. Applications 1. Psychology – SRT (A & V). 2. Ballistic experiments (speed of bullets). 3. Physiology (Nerve impulse transmission & velocity of various sense impressions). 4. Physics (Rapid motions i.e. time taken by a falling body). 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana

6. References: 1. Sturm, T., & Ash, M. G. (2005). Roles of Instruments in Psychological Research. History of Psychology, 8(1), 3–34. doi:10.1037/1093-4510.8.1.3. 2. Schmidgen , H. (2005). Physics, Ballistics, and Psychology: A History of the Chronoscope in/as Context, 1845-1890. History of Psychology, 8(1), 46–78. doi:10.1037/1093-4510.8.1.46 3. https://en.wikipedia.org/wiki/Time_viewer 4. https://en.wiktionary.org/wiki/chronoscope. 5. http://vlp.mpiwg-berlin.mpg.de/essays/data/enc13?p=2 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana

7. [email protected] Next Discussion Muller lyer Illusion Apparatus 8/7/2020 PPT slides © Dr Rajesh Verma FGM Govt Collage Adampur, Hisar, Haryana