The actual area of Turkey inclusive of its lakes is 814,578 square kilometres and has land area in both Europe and Asia. Turkey is surrounded by two European (Greece and Bulgaria) and five Asian (Georgia, Armenia, Iran, Iraq and Syria) countries. The average altitude of the country is approximately 1,130 metres above sea level. The country is administratively divided into 80 provinces. These are further subdivided into districts, subdivisions and villages. According to the 1995 census, the total population of Turkey is 62.2 millions; of them, 63% live in urban areas. The population is expected to reach 69.5 million in the year 2000 and 82 million in 2010 (MOH, 1997a). The population of Turkey is relatively young. According to 1995 census data, 35% of the total population is under the age of 15 years and only 4.2% are over the age of 65 years. The projections to determine the age distribution of the population for the year 2025 are 22.9% and 9.0% for the respective age groups, with an elderly population creating different health care service demand during the 21st century (MOH, 1997a). TRENDS IN FOOD CONSUMPTION PATTERNS Turkey, with respect to its climate and land nature, has an arable land. The share of the crop production in agricultural production was 56.9% in 1991 and 66.7% in 1994. In 1994 about 33.3% of agricultural production was cereals and 17.1% was industrial plants (MOA, 1996). Wheat is a staple food for the Turkish people. The major percentage of energy comes from bread with other cereals (58%). Annual wheat consumption per capita is 150-200 kgs. Wheat is mainly consumed as bread, macaroni and bulgur (parboiled pounded

'Personal Nutrition Management Tool' (PENUMAT) is an interactive web-based application which aims to help individuals seeking nutrition information on the Internet. However, little is known about the usability of such applications. The purpose of this study was to evaluate the usability of PENUMAT using multi-method approach. For an in-depth usability analysis, using a multi-method approach involving protocol analysis, interviews and a system usability scale (SUS) was adopted. The sample consisted of 10 healthy (five males and five females) volunteers between the ages of 22 and 60. The overall usability score was calculated; usability problems and users' opinions were obtained. All usability problems were classified according to the heuristics and listed with their frequencies. Overall, the usability score ranged from 77.5 to 100, with a median of 88.7. In-depth usability analysis exposed several usability problems mostly related to content, navigation and interactivity. Interview results showed that 'being personal and private' (70%) and 'providing personal feedbacks' (60%) were the most appreciated characteristics of the tool. Although the tool has an acceptable overall usability score, several unnoticed usability problems of the interface design were realised with the in-depth analysis. Therefore, the importance of using a multi-method analysis of usability was pointed out.

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