621 may refer to:
Factor, a Latin word meaning "who/which acts", may refer to:
STS-31 was the 35th mission of the NASA Space Shuttle program. The primary purpose of this mission was the deployment of the Hubble Space Telescope (HST) into low Earth orbit. The mission used the Space Shuttle Discovery, which lifted off from Launch Complex 39B on April 24, 1990, from Kennedy Space Center, Florida.
The Stanford prison experiment (SPE) was a psychological experiment conducted in the summer of 1971. It was a two-week simulation of a prison environment that examined the effects of situational variables on participants' reactions and behaviors. Stanford University psychology professor Philip Zimbardo led the research team who administered the study.
Criminal psychology, also referred to as criminological psychology, is the study of the views, thoughts, intentions, actions and reactions of criminals and suspects. It is a subfield of criminology and applied psychology.
E621 may refer to:
Observer effect, observer bias, observation bias, etc. may refer to a number of concepts, some of them closely related:
In statistics, a full factorial experiment is an experiment whose design consists of two or more factors, each with discrete possible values or "levels", and whose experimental units take on all possible combinations of these levels across all such factors. A full factorial design may also be called a fully crossed design. Such an experiment allows the investigator to study the effect of each factor on the response variable, as well as the effects of interactions between factors on the response variable.
Global Communication is an electronic music act, consisting of Tom Middleton and Mark Pritchard.
Disney's Stitch: Experiment 626 is a 2002 action-adventure video game developed by High Voltage Software and published by Sony Computer Entertainment for the PlayStation 2. The game serves as a prequel to the 2002 Disney film Lilo & Stitch. The game has Chris Sanders, David Ogden Stiers and Kevin Michael Richardson reprise their voice roles from the film. The game was released on June 19, 2002, two days before the theatrical release of the Lilo & Stitch film.
Chop suey is a dish in American Chinese cuisine.
Now That's What I Call Music! 7 was released on July 31, 2001. The album is the seventh edition of the (U.S.) Now! series. It debuted at number one on the Billboard 200 albums chart, selling 621,000 copies in its first week, the highest opening week of sales for any U.S. Now! album to date. It is the third number-one album in the series and has been certified 3× Platinum by the RIAA. Now! 7 is the first in the series to also crossover onto the Billboard Top R&B/Hip-Hop Albums chart, peaking at number three.
A quasi-experiment is an empirical interventional study used to estimate the causal impact of an intervention on target population without random assignment. Quasi-experimental research shares similarities with the traditional experimental design or randomized controlled trial, but it specifically lacks the element of random assignment to treatment or control. Instead, quasi-experimental designs typically allow the researcher to control the assignment to the treatment condition, but using some criterion other than random assignment.
M621 can refer to:
Validity or Valid may refer to:
No. 621 Squadron RAF was a reconnaissance squadron of the Royal Air Force during World War II, flying from Somaliland and Aden. It was after the war stationed in Egypt and Palestine and tasked with air-sea rescue and was also active in Operation Sunburn, looking for illegal immigrants.
A social experiment is a type of psychological or sociological research for testing people's reactions to certain situations or events. The experiment depends on a particular social approach where the main source of information is the point of view and knowledge of the participants of the experiment. To carry out a social experiment, specialists usually split participants into two groups — active participants and respondents. Throughout the experiment, participants are monitored by specialists to identify the effects and differences as a result of the experiment. Intentional communities are generally considered as social experiments.
German submarine U-621 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 1 July 1941 by Blohm & Voss in Hamburg as yard number 597, launched on 19 March 1942 and commissioned on 7 May 1942 under Kapitänleutnant Horst Schünemann.
The Mu variant, also known as lineage B.1.621 or VUI-21JUL-1, is one of the variants of SARS-CoV-2, the virus that causes COVID-19. It was first detected in Colombia in January 2021 and was designated by the WHO as a variant of interest on August 30, 2021. The WHO said the variant has mutations that indicate a risk of resistance to the current vaccines and stressed that further studies were needed to better understand it. Outbreaks of the Mu variant were reported in South America and Europe. The B.1.621 lineage has a sublineage, labeled B.1.621.1 under the PANGO nomenclature, which has already been detected in more than 20 countries worldwide.