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Self Report: Method for obtaining information through verbal responses, written or oral, from subjects.
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 JoVE Medicine

An Affordable HIV-1 Drug Resistance Monitoring Method for Resource Limited Settings

1Africa Centre for Health and Population Studies, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa, 2Unit D11, Jembi Health Systems, 3Academic Medical Center, Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), University of Amsterdam, 4Division of Infectious Diseases and Geographic Medicine, Centre for AIDS Research, Stanford Medical School


JoVE 51242

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 Science Education: Essentials of Cognitive Psychology

Mental Rotation

JoVE Science Education

Source: Laboratory of Jonathan Flombaum—Johns Hopkins University

Visual mental imagery refers to the ability to conjure images in one’s mind’s eye. This allows people to process visual material above and beyond the constraints of a current point-of-view; for example, a person could imagine, using their mind’s eye, how something might look in a different color, or what it would look like if it were made from a different material or rotated and seen from a different perspective. Mental imagery seems to support important human behaviors in many contexts. For example, people report visualizing routes and maps when planning a route or giving directions. They report visualizing movements, such as swinging a bat, to prepare for an actual action. They also report the mental rotation of objects in order to consider how an object might fit into a receptacle or clear a barrier. This video demonstrates how to use the mental rotation procedure in order to investigate visual mental imagery.

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 JoVE Immunology and Infection

A Semi-automated Approach to Preparing Antibody Cocktails for Immunophenotypic Analysis of Human Peripheral Blood

1Human Immune Monitoring Laboratory, Earle A. Chiles Research Institute, Providence Cancer Center, Providence Portland Medical Center, 2Sony Biotechnology, 3Beckman Coulter, Inc. Life Sciences, 4Bristol-Myers Squibb


JoVE 53485

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 JoVE Neuroscience

Imaging Membrane Potential with Two Types of Genetically Encoded Fluorescent Voltage Sensors

1Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, 2Center for Functional Connectomics, Korea Institute of Science and Technology, 3College of Life Sciences and Biotechnology, Korea University, 4Advanced Institutes of Convergence Technology


JoVE 53566

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 JoVE Immunology and Infection

Measurement of In Vitro Integration Activity of HIV-1 Preintegration Complexes

1Center for AIDS Health Disparities Research, Meharry Medical College, 2Department of Biochemistry and Cancer Biology, Meharry Medical College, 3School of Graduate Studies and Research, Meharry Medical College, 4Department of Microbiology and Immunology, Meharry Medical College, 5Tennessee Center for AIDS Research (TN-CFAR), Meharry Medical College


JoVE 54581

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 Science Education: Essentials of Sensation and Perception

Inattentional Blindness

JoVE Science Education

Source: Laboratory of Jonathan Flombaum—Johns Hopkins University

We generally think that we see things pretty well if they are close by and right in front of us. But do we? We know that visual attention is a property of the human brain that controls what parts of the visual world we process, and how effectively. Limited attention means that we can't process everything at once, it turns out, even things that might be right in front of us. In the 1960s, the renowned cognitive psychologist Ulrich Neisser began to demonstrate experimentally that people can be blind to objects that are right in front of them, literally, if attention is otherwise distracted. In the 1980s and 1990s, Arien Mack and Irvin Rock followed up on Neisser's work, developing a simple paradigm for examining how, when, and why distracted attention can make people fail to see the whole object. Their experiments, and Neisser's, did not involve people with brain damage, disease, or anything of the sort, just regular people who failed to see objects that were right in front of them. This phenomenon has been called inattentional blindness. This video will demonstrate basic procedures for investigating inattentional blindness using the methods of Mack and Rock.1

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 Science Education: Essentials of Experimental Psychology

Self-report vs. Behavioral Measures of Recycling

JoVE Science Education

Source: Laboratories of Gary Lewandowski, Dave Strohmetz, and Natalie Ciarocco—Monmouth University

One of the challenges in measuring an experimental variable is identifying the technique that will produce the more accurate measurement. The most common way to measure a dependent variable is self-report—asking the participant to describe his/her feelings, thoughts, or behaviors. Yet, people may not be honest. To truly know something about a participant, it may be necessary to see what they actually do in a situation. This video uses a multi-group experiment to see if feeling close to others results in more favorable attitudes toward environmental consciousness measured both by self-report and behavioral observation. Psychological studies often use higher sample sizes than studies in other sciences. A large number of participants helps to better ensure that the population under study is better represented, i.e., the margin of error accompanied by studying human behavior is sufficiently accounted for. In this video, we demonstrate this experiment using just one participant. However, as represented in the results, we used a total of 186 participants to reach the experiment’s conclusions.

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 JoVE Medicine

Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling

1Orthopedic and Trauma Surgery, University Hospital Erlangen, 2Pediatric Surgery, University Hospital Erlangen, 3Orthopedic and Trauma Surgery, St.-Theresien Hospital, 4Institute of Anatomy I, University Erlangen-Nuremberg


JoVE 52124

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 JoVE Medicine

The Multiple Sclerosis Performance Test (MSPT): An iPad-Based Disability Assessment Tool

1Mellen Center for Multiple Sclerosis Treatment and Research, Cleveland Clinic Foundation, 2Center for Brain Health, Cleveland Clinic Foundation, 3Quantitative Health Sciences, Cleveland Clinic Foundation, 4Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic Foundation


JoVE 51318

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 Science Education: Essentials of Social Psychology

The Implicit Association Test

JoVE Science Education

Source: Julian Wills & Jay Van Bavel—New York University

One of the core constructs in social psychology is the notion of an attitude toward an object or person. Traditionally, psychologists measured attitudes by simply asking people to self-report their beliefs, opinions, or feelings. This approach has limitations, however, when measuring socially sensitive attitudes, like racial prejudice, because people are often motivated to self-report unprejudiced, egalitarian beliefs (despite harboring negative associations). In order to bypass this social-desirability bias, psychologists have developed a number of tasks that attempt to measure implicit attitudes that are less amenable to deliberate control (and potential distortion). The Implicit Association Test, or IAT, is one of the most influential measures of these unconscious attitudes. The IAT was first introduced in a 1998 paper by Anthony Greenwald and colleagues.1 This video will demonstrate how to conduct the IAT used in the final experiment, where European American participants (who report explicit egalitarian attitudes) exhibit implicit preferences for their own race.

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 JoVE Bioengineering

Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton

1Department of Veterans Affairs (VA) Rehabilitation Research and Development National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center, 2Department of Veterans Affairs (VA) Spinal Cord Injury Service, James J. Peters VA Medical Center


JoVE 54071

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