Factors influencing contraception continuation rates: The oral and the intrauterine methods

The technique of multi-sort analysis was used to compare the relative duration of use of oral and intrauterine contraception among low socio-economic groups in Baltimore City. The clinical records of over 12,000 women who had received contraception through the Baltimore public services were analyzed. The type of method a woman used was found to be the most important factor affecting her probability of continuing contraception. Her age, race, and how long she had been using the method also influenced this probability. The strictness of the criteria used for the definition of continuation rates and the fact that experience was incomplete for many intrauterine contraceptors probably in part explain the somewhat low continuation rates obtained for both methods. It is suggested that the intrinsic characteristics of each method may lead to a clinical impression favoring the oral even when statistical evidence, as presented here, favors the intrauterine method.     

Nonverbal decoding skill and attention to nonverbal cues: A research note

A measure of differential preference for attending to three channels of nonverbal communication was developed, with which scores for differential attention to face, body, and voice tone were generated for 17 college subjects. These scores were correlated with subjects' nonverbal decoding accuracy in the same three channels as measured by a standard test of decoding nonverbal cues. Significant positive relationships between channel preference and accuracy were found for the two video channels; no relationship was found for the audio channel.This research was conducted while both authors held National Science Foundation Graduate Fellowships at Harvard University. They wish to thank Robert Rosenthal for advice, Peter L. Rogers for technical assistance and Myron Wish for valuable criticisms of an earlier draft.     

BALANCED DESIGNS FOR ROW-AND-COLUMN EXPERIMENTS WITH TWO NON-INTERACTING SETS OF TREATMENTS, ONE SET NOT BEING APPLIED TO ALL THE ROWS1

This note gives and discusses balanced row-and-column designs for experiments with two non-interacting sets of treatments, one set not being applied to all the rows. These designs are potentially useful for occasions when trees that have tested one set of experimental treatments are needed for testing a second set before the residual effects of the first have become negligible, but when the experimenter wishes to apply the second set to only some of the rows. The designs are appropriate if the residual and new effects do not interact.     

Race Differences in Abortion Attitudes

Abstract Public opinion surveys since 1965 find that black respondentsare less in favor of legal abortion than white respondents.Using the 1982 NORC General Social Survey, we replicate andexpand one of the few studies (Combs and Welch, 1982) that examinedthe structure and determinants of prochoice attitudes of blacksand whites. Our major findings are (1) the racial differencein prochoice attitude is as great in 1982 as in the 1970s, (2)contrary to the suggestion of Combs and Welch, the demographicand attitudinal determinants of abortion attitudes differ forblacks and for whites, and (3) for those respondents who differentiatetheir acceptance of legal abortion, the pattern of prochoiceattitudes also differs by race.     

EXACT TWO-SAMPLE MEDIAN TESTS WHEN ONE "SAMPLE" VALUE POSSIBLY FROM A DIFFERENT POPULATION

Random samples are assumed for the univariate two-sample problem. Sometimes this assumption may be violated in that an observation in one “sample”, of size m, is from a population different from that yielding the remaining m—1 observations (which are a random sample). Then, the interest is in whether this random sample of size m—1 is from the same population as the other random sample. If such a violation occurs and can be recognized, and also the non-conforming observation can be identified (without imposing conditional effects), then that observation could be removed and a two-sample test applied to the remaining samples. Unfortunately, satisfactory procedures for such a removal do not seem to exist. An alternative approach is to use two-sample tests whose significance levels remain the same when a non-conforming observation occurs, and is removed, as for the case where the samples were both truly random. The equal-tail median test is shown to have this property when the two “samples” are of the same size (and ties do not occur).     

Estimable Versions of Griffiths' Measure of Association

Many techniques have been proposed for measuring the degree of association between a pair of random variables X and Y. However, the measures often suffer from two drawbacks: they are difficult to calculate when the joint distribution of (X, Y) is known, and difficult to estimate when the joint distribution is unknown. In the present paper we present two modifications of a measure proposed by Griffiths (1972), and show that they exhibit neither of these deficiencies.     

Shaping the future of social work in end-of-life and palliative care

The second Social Work Summit on End-of-Life and Palliative Care was held from June 1 to June 3, 2005. Sixty representatives of more than 35 social work and other professional organizations with a commitment to improve care for the terminally ill, dying, and bereaved, attended and formulated key priority directions and initiatives that will further the field.     

The effects of traffic noise on tadpole behavior and development

Urban Ecosystems - Traffic noise is known to negatively affect many wildlife species by interfering with foraging behavior. Frogs often lay their eggs in roadside ditches because they are...