Browsing by Subject "Comparative Study"

Now showing 1 - 3 of 3

Open Access
Content-based retrieval of historical Ottoman documents stored as textual images
(IEEE, 2004) Şaykol, E.; Sinop, A. K.; Güdükbay, Uğur; Ulusoy, Özgür; Çetin, A. Enis
There is an accelerating demand to access the visual content of documents stored in historical and cultural archives. Availability of electronic imaging tools and effective image processing techniques makes it feasible to process the multimedia data in large databases. In this paper, a framework for content-based retrieval of historical documents in the Ottoman Empire archives is presented. The documents are stored as textual images, which are compressed by constructing a library of symbols occurring in a document, and the symbols in the original image are then replaced with pointers into the codebook to obtain a compressed representation of the image. The features in wavelet and spatial domain based on angular and distance span of shapes are used to extract the symbols. In order to make content-based retrieval in historical archives, a query is specified as a rectangular region in an input image and the same symbol-extraction process is applied to the query region. The queries are processed on the codebook of documents and the query images are identified in the resulting documents using the pointers in textual images. The querying process does not require decompression of images. The new content-based retrieval framework is also applicable to many other document archives using different scripts.
Open Access
How dysfunctional are the dysfunctional attitudes in another culture?
(1992) Şahin, N. H.; Şahin, N.
The Dysfunctional Attitude Scale (DAS-A) has been used in many studies to measure depressogenic attitudes, vulnerability to depression and to assess the effectiveness of cognitive therapy. Despite its frequent use in research, no data have yet been reported on its item validity. The purpose of the present study was to investigate the item validity and psychometric properties of the DAS-A in the Turkish cultural context. The subjects were 345 university students. The locally adapted versions of the Beck Depression Inventory and the Automatic Thoughts Questionnaire were also administered. The reliability coefficients and the factor structure of the DAS-A were found to be similar to those reported in the West. However, the total mean was found to be unusually, high. The reason for this elevated mean score was as found to reside in the response patterns of the subjects to the reverse items. None of these 10 reverse items discriminated the dysphoric and non-dysphoric groups. A closer examination revealed these 10 items to reflect autonomous attitudes. It seems that these 10 reverse items do nothing but distort the mean scores and render cross-cultural comparisons difficult. Recent research on depression shows that, while autonomy may or may not be related to depression, sociotropy has consistent association with it. Researchers in other cultures and those working with minority and immigrant groups are warned against this bias inherent in the DAS-A.
Open Access
Reliability and validity of the Turkish version of the automatic thoughts questionnaire
(Wiley, 1992) Sahin, N. H.; Sahin, N.
The present study investigated the reliability and validity of the ATQ in the Turkish cultural context. It is hoped that with this type of cross- cultural information, the universality of the proposed cognitive constructs can be advocated more reliably. The subjects were 345 university students; the split-half reliability of the ATQ was found to be r = .91 and Cronbach's alpha was .93; and item/total correlations ranged between .36 and .69. The Turkish ATQ correlated well with the BDI (r = .75), and it discriminated successfully between the symptomatic and asymptomatic groups. Factor analysis revealed five factors that were similar to those found in American samples. Nevertheless, some differences were noticed in the relative strength of the factors and in the distribution of items into factor clusters.