15,648 research outputs found
Jewelry Interactions: from Analog to Digital
No full textDigital technologies and scientific advancements, besides having revolutionized the entire jewelry supply chain, overturning the phases and the roles of the actors involved, have permeated the products themselves, affecting their physical and aesthetic features and the systems of interaction they enable.
This paper aims to investigate the different systems of interactions within the field of jewelry, focusing on the transition from an analog to a digital context.
First, the effects of digital technologies on the supply chains in terms of interaction are briefly described. In particular, the paper finds a possibility to generate an important value for the consumers in open structures, engaging them in co-creating the products along the different phases.
Furthermore, the analysis focuses on the product, describing the evolution of interaction mediated by jewelry conceived as an interface, from analog to digital.
To this end, the paper suggests a classification of the different types of interaction systems enabled by jewelry as a medium: the static linear system (analog jewelry), the dynamic linear system (relational jewelry), the close circuit dynamic system (jewelry made with smart and reactive materials), and the open circuit dynamic system (wearable technologies). The different systems are described in terms of relationships, features and elements of interaction.
The analysis demonstrates how circular open systems represent a turning point for the evolution of body ornaments. This system resulting from new technological and scientific advancements enhances some features that were already intrinsic in the more traditional jewelry systems, such as the relational component it also offers and, other powerful tools to create a one-of-a-kind and made-to-measure experience for the wearer
Psihometrijska validacija Testa S
No full textExperience of psychologists in practice releveal that, since the content of tests often becomes publicly known with time, there is a constant need for new intelligence tests. The aim of this research was to make a complete analysis of the preliminary form of the Test S, a new abstract thinking test, and its 61 items, so that the final, more economical version of the test could be made. The test was administered to 172 participants - senior high-school students and students of different professions, for the duration of one hour. Results of the test are distributed normally. The average difficulty index (p=0,675) shows that the participants didn't find the test to be too difficult. The Cronbach alpha index points to high test reliability (Ã�±=0,908). Test sensitivity is also high, according to Ferguson's index ('=0,980). The factor analysis gave more factors, but from the sizes of their eigenvalues it can be concluded that there is only one general factor, which describes 17% of the variance. A short version of the test is suggested, containing 44 items, with estimated test administration of 30-35 minutes. Normal distribution of results has been preserved and the test difficulty increased towards the optimal one. By deleting 17 items, the reliability and the sensitivity of the test have even increased, and in the factor structure, the general factor is even more emphasized with a variance explanation of 22%. We can conclude that by reducing its size, the Test S became more effective. Replication of this study on a representative sample and test standardization are recommended. It would be highly useful to check how the short version of the test functions in practice.Iskustva psihologa u praksi pokazala su da sadržaj testova s vremenom postaje poznat, stoga postoji stalna potreba za razvojem novih testova inteligencije. Cilj ovog rada je provesti analizu preliminarne forme Testa S, novog testa apstraktnog mišljenja, i njegovog 61 zadatka, kako bi se stvorila konačna, ekonomičnija, verzija testa. Test je primijenjen na 172 sudionika, učenika viših razreda srednje škole i studenata različitih usmjerenja, u trajanju od sat vremena. Dobivena je normalna distribucija rezultata, a prosječni indeks lakoće (p=0,675) govori da test sudionicima nije bio pretjerano težak. Cronbachov koeficijent ukazuje na vrlo visoku pouzdanost testa (Ã�±=0,908). Osjetljivost testa, prema Fergusonovom koeficijentu također je visoka ('=0,980). Faktorskom analizom dobiva se veći broj faktora, no veličine njihovih karakterističnih korijena ukazuju na postojanje jednog generalnog faktora, koji objašnjava 17% varijance. Na osnovi rezultata predložena je skraćena verzije testa od 44 zadatka, predviđenog trajanja primjene 30-35 minuta. Očuvala se normalna distribucija rezultata, a težina se testa povećala prema optimalnoj. Izbacivanjem 17 zadataka pouzdanost i osjetljivost testa su se čak povećale (Ã�±=0,912; '=0,980), a u faktorskoj strukturi još više do izražaja dolazi generalni faktor, koji objašnjava 22% varijance. Možemo zaključiti da je skraćivanjem Test S dobio na ekonomičnosti, uz povećanu kvalitetu. Preporuča se provjeriti rezultate dobivene u ovom radu na reprezentativnom uzorku, kao i funkcioniranje kraće verzije u praksi, te provesti standardizaciju
Polytomous diagnosis of ovarian tumors as benign, borderline, primary invasive or metastatic: development and validation of standard and kernel-based risk prediction models
No full text25.03.14 KB. Ok to add published version to spiral, OA pape
Računalna primjena testa S
No full textPapir-olovka forma Testa S prilagođena je za računalnu primjenu. Računalna forma je primijenjena na 131 sudioniku, studentima Psihologije s Filozofskog fakulteta i studentima Fakulteta elektrotehnike i računarstva, u trajanju od 45 minuta. Dobivena je normalna distribucija s prosječnim indeksom lakoće p=0.75 koji govori da test sudionicima nije bio pretjerano težak. Cronbachov koeficijent ukazuje na relativno visoku pouzdanost testa (=0.84). Osjetljivost testa, izražena Fergusonovim koeficijentom, je također visoka (δ=0.968). Uvjeti za provedbu faktorske analize nisu ispunjeni, ali njeni rezultati ukazuju na postojanje jednog generalnog faktora koji objašnjava 11% varijance. Ti podaci ukazuju na generalno slaganje s papir-olovka primjenom testa.
Analizom prosječnog vremena do prvog odgovora pronađena je korelacije r=−0.645 s indeksom lakoća zadatka, što govori u prilog tome da se za teže zadatke treba izdvojiti više vremena. Većina sudionika mijenja do 6 odgovora u zadacima, iako među sudionicima postoje velike individualne razlike. Analizom vremena do prvog odgovora nije ustanovljen utjecaj rednog mjesta točnog odgovora na brzinu odgovaranja. Kategorizacijom sudionika po brzini (3 kategorije) i točnosti odgovaranja (3 kategorije), sudionici su podijeljenu u različite kategorije uspješnosti (9 kategorija). Krivulje koje prikazuju zavisnost vremena prvog odgovora o testovnom rezultatu prikazuju različite odnose od kojih se pojedini ne mogu teoretski objasniti.
Podaci dobiveni računalnom primjenom mogu se koristiti u postupku konstrukcije testova i specifičnim selekcijskim postupcima gdje je osim točnosti bitna i brzina rada. Navedena su i neka metodološka ograničenja koja smanjuju generalizaciju dobivenih zaključaka. Rezultate iz ovog istraživanja potrebno je provjeriti na reprezentativnom uzorku te ispitati korisnost vremenskih varijabli koje dobivamo računalnom primjenom testa.The paper and pencil version of Test S has been adapted for computer administration. The computer form has been administered to 131 participants, students of the Psychology Department of the Faculty of Humanities and Social Sciences and students of the Faculty of Electrical Engineering and Computing, for the duration of 45min. The test results have had a normal distribution with an average difficulty index of p=0.75 which implies that the test wasn’t very difficult for the participants. The Cronbach alpha index indicates that the test reliability is relatively high (=0.84). The test sensitivity, expressed with the Ferguson’s index, is also high (δ=0.968). Prerequisites for the factor analysis haven’t been fulfilled, but the analysis results point to one general factor which explains 11% of the total variance. The described data indicate general compliance with the paper and pencil test data.
A correlation of r=−0.645 between the difficulty index and the average time to the first answer implies that the more difficult the items are, the more time is requested for their solving. Most participants change up to 6 answers in their tasks, although there are great individual differences among them. The analysis showed no influence of the correct answer position on response speed. Different categories of test successfulness (9 categories) have been obtained by categorizing participants according to the speed (3 categories) and correctness of response (3 categories). Different forms of curves relating to the time of the first answer and the test result have been established; however, not all of them can be theoretically explained.
The data obtained from the computer administration can be used during test construction and in specific selection procedures where, besides correctness, working speed is important, too. Methodological issues which diminish generalization of the conclusions have been discussed. Additional research is needed on the usefulness of the time related variables obtained from the computer administration and the results of this research have to be verified on a representative sample
- …
