Finding a common ordination for several data sets by individual differences scaling

Vegetatio ◽  
1989 ◽  
Vol 83 (1-2) ◽  
pp. 137-145 ◽  
Author(s):  
Jari Oksanen ◽  
Pertti Huttunen
Author(s):  
John C. Gower ◽  
Niël J. Le Roux ◽  
Sugnet Gardner-Lubbe

2020 ◽  
Author(s):  
Martin Schnuerch ◽  
Lena Nadarevic ◽  
Jeffrey Rouder

The repetition-induced truth effect refers to a phenomenon where people rate repeated statements as more likely true than novel statements. In this paper we document qualitative individual differences in the effect. While the overwhelming majority of participants display the usual positive truth effect, a minority are the opposite – they reliably discount the validity of repeated statements, what we refer to as negative truth effect. We examine 8 truth-effect data sets where individual-level data are curated. These sets are composed of 1,105 individuals performing 38,904 judgments. Through Bayes factor model comparison, we show that reliable negative truth effects occur in 5 of the 8 data sets. The negative truth effect is informative because it seems unreasonable that the mechanisms mediating the positive truth effect are the same that lead to a discounting of repeated statements' validity. Moreover, the presence of qualitative differences motivates a different type of analysis of individual differences based on ordinal (i.e., Which sign does the effect have?) rather than metric measures. To our knowledge, this paper reports the first such reliable qualitative differences in a cognitive task.


Author(s):  
Martin Schnuerch ◽  
Lena Nadarevic ◽  
Jeffrey N. Rouder

Abstract The repetition-induced truth effect refers to a phenomenon where people rate repeated statements as more likely true than novel statements. In this paper, we document qualitative individual differences in the effect. While the overwhelming majority of participants display the usual positive truth effect, a minority are the opposite—they reliably discount the validity of repeated statements, what we refer to as negative truth effect. We examine eight truth-effect data sets where individual-level data are curated. These sets are composed of 1105 individuals performing 38,904 judgments. Through Bayes factor model comparison, we show that reliable negative truth effects occur in five of the eight data sets. The negative truth effect is informative because it seems unreasonable that the mechanisms mediating the positive truth effect are the same that lead to a discounting of repeated statements’ validity. Moreover, the presence of qualitative differences motivates a different type of analysis of individual differences based on ordinal (i.e., Which sign does the effect have?) rather than metric measures. To our knowledge, this paper reports the first such reliable qualitative differences in a cognitive task.


1983 ◽  
Vol 10 (2) ◽  
pp. 293-320 ◽  
Author(s):  
Inge Bretherton ◽  
Sandra McNew ◽  
Lynn Snyder ◽  
Elizabeth Bates

ABSTRACTThe study focuses on the language abilities of 30 20-month-old children, using data from two sources: a detailed maternal interview and 90 minutes of videotaped observation. Observed language was coded into the categories used for the interview. Production and comprehension at 28 months (MLU, PPVT and morphology comprehension) were also assessed. Observation and interview data at 20 months were highly intercorrelated. Cluster analyses of both data sets yielded referential, grammatical morpheme and dialogue clusters, providing partial support for the nominal/pronominal and referential/expressive acquisition styles reported in the literature. However, the referential and grammatical morpheme clusters were highly correlated, suggesting that two acquisition strategies are developing in parallel. Only for those children who heavily emphasize one strategy can one speak of a distinctive style. All interview and observation clusters predicted 28-months MLU, but the grammatical morpheme clusters did not predict later performance on a Grammatical Morpheme Test. It is tentatively suggested that holistic processing strategies underlie the pronominal/expressive style.


1997 ◽  
Vol 17 (3) ◽  
pp. 243-252 ◽  
Author(s):  
Ricardo Garcı́a-Mira ◽  
Constantino Arce ◽  
José M. Sabucedo

Sign in / Sign up

Export Citation Format

Share Document