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As the Internet has changed communication, commerce, and the distribution of information, so too it is changing psychological research. Psychologists can observe new or rare phenomena online and can do research on traditional psychological topics more efficiently, enabling them to expand the scale and scope of their research. Yet these opportunities entail risk both to research quality and to human subjects. Internet research is inherently no more risky than traditional observational, survey, or experimental methods. Yet the risks and safeguards against them will differ from those characterizing traditional research and will themselves change over time. This article describes some benefits and challenges of conducting psychological research via the Internet and offers recommendations to both researchers and institutional review boards for dealing with them.

Abstract Human-computer interaction (HCI) is a multidisciplinary field in which psychology and other social sciences unite with computer science and related technical fields with the goal of making computing systems [...]

The problem appearing in the April 2001 'Problem Solvers' section was stated as follows: Lori and Betty are pretending to have a garage sale. They found five 30cents price tags [...]

The problem in the May 2000 'Problem Solvers' department was stated as follows: Danny, Connie, and Jane have eight cookies to share among themselves. They decide that they each do [...]

Guar gum, a dietary fiber known to improve glucose tolerance, was fed to rats with established diabetes to determine its effect on renal enlargement and microalbuminuria. Diabetic rats were fed a modified AIN-76A (basal) diet for 4 wk, at which time half the rats continued to receive the same basal diet (DB-BA group) and half were switched to a 5% guar gum diet (DB-GG group). Nondiabetic rats fed the basal diet served as controls (NRL group). After 8 additional weeks the animals were killed. Glycated hemoglobin, a measure of long-term blood glucose control, was 14.4% in the DB-BA group and 12.4% in the DB-GG group, a statistically significant difference (P < 0.05). Kidney weight of the DB-BA group (3.51 g) was significantly greater than that of the DB-GG group (2.76 g) (P < 0.05). Eight weeks after induction of diabetes, 24-h urinary albumin excretion was highest in the DB-BA group and lowest in the NRL group; excretion in the DB-GG group (4 wk of guar feeding) was intermediate. However, by 12 wk no differences in albumin excretion among the groups were apparent. These results suggest that guar gum may be useful for slowing the progression of diabetic nephropathy and that guar gum deserves further study in this regard. J. Nutr. 122: 2391-2397, 1992.

The problem in the December 2000 'Problem Solvers' department was stated as follows: Jeff and Carol were making designs with square tiles. They each had eight tiles. Jeff made the [...]

Tiles and Sides The goal of the 'Problem Solvers' department is to foster improved communication among teachers by posing one problem each month for K-6 teachers to try with their [...]

Problem Danny, Connie, and Jane have eight cookies to share among themselves. They decide that they each do not need to get the same number of cookies, but each person [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by posing one problem each month for K-6 teachers to try with their students. Every teacher [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by posing one problem each month for K-6 teachers to try with their students. Every teacher [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by posing one problem each month for K-6 teachers to try with their students. Every teacher [...]

The problem appearing in the February 1999 'Problem Solvers' section was stated as follows: Use four isosceles triangles as shown, and place all of them together along edges with no [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by posing one problem each month for K-6 teachers to try with their students. Every teacher [...]

The problem appearing in the October 1998 'Problem Solvers' section was stated as follows: One event at a carnival asked contestants to guess the weight of three objects: a tetrahedron, [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by presenting one problem each month for teachers of grades K-6 to try with their students. [...]

The problem appearing in the May 1998 'Problem Solvers' section was stated as follows: How many squares can you count in this figure? Suppose that we add a fifth row [...]

These activities are designed to appeal directly to students. Students may work individually, in pairs, or in small groups. No solutions are suggested or provided for activities so that students [...]

The goal of the 'Problem Solvers' department is to foster communication among teachers by posing one problem each month for K-6 teachers to try with their students. Every teacher can [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by posing one problem each month for K-6 teachers to try with their students. You, as [...]

These activities are designed to appeal directly to students. Students may work on the activities individually, in pairs, or in small groups. No solutions are suggested or given for the [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by proposing one problem each month for K-6 teachers to try with their students. It is [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by proposing one problem each month for K-6 teachers to try with their students. It is [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by proposing one problem each month for K-6 teachers to try with their students. It is [...]

The goal of the 'Problem Solvers' department is to foster improved communication among teachers by proposing one problem a month for K-6 teachers to try with their students. It is [...]