The importance of test order in external and standardized test results: The case of PISA 2018.

Standardized tests intend to reduce information asymmetry by providing a common and objective measure of students' academic performance. The basic assumption underlying standardized testing is that differences in student performance on standardized tests should be attributed primarily to differences in the quality of education received by students. However, there is evidence that environmental factors can affect standardized test scores, which may result in anomalous observations or outliers that show a distortion of student performance.

A review on LED technology in water photodisinfection.

The increase in efficiency achieved by UV LED devices has led to a compelling increase in research reports on UV LED water treatment for consumption in the past few years. This paper presents an in-depth review based on recent studies on the suitability and performance of UV LED-driven processes for water disinfection. The effect of different UV wavelengths and their combinations was analysed for the inactivation of various microorganisms and the inhibition of repair mechanisms.

[Psychotherapeutic knowledge and skills: essential in working as a psychiatrist].

Psychotherapeutic skills are essential elements in the daily work of psychiatrists. This article aims to bring attention to the psychotherapeutic competences described in the new training program for psychiatrists in the Netherlands. To illustrate the competences, two clinical cases are presented in which the psychiatrist executes psychotherapeutic skills to be effective in diagnosis and treatment.

High-performance low-cost solar collectors for water treatment fabricated with recycled materials, open-source hardware and 3d-printing technologies.

Solar technologies constitute an excellent alternative for water treatment in low-income countries where the poverty of a large part of the population hinders their access to safe water. From a technical point of view, the use of compound parabolic collectors (CPC) has been consolidated in the last decades. However, the relatively high cost of tooling conventional manufacturing processes for these collectors makes them difficult to afford in the most impoverished regions.

[Plea for early recognition, diagnosis and treatment of comorbid personality disorder in treatment-resistant depression].

It is known that personality traits can disappear during recovery from depressive disorder. Three case descriptions show the opposite: depressive symptoms can disappear after psychotherapeutic treatment of the personality disorder. In the treatment of depression, early recognition and diagnosis of a comorbid personality disorder is essential for considering different treatment options.