Miguel A. Vallejo

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BACKGROUND Internet psychology services are rapidly increasing and that implies online assessment. To guarantee the results of these new online evaluation procedures, it is necessary to have reliable and valid assessment tools. OBJECTIVE In this work we analyzed the online versions of two popular psychopathology screening questionnaires: the General(More)
Here we describe the equational theorem prover Barcelona, in its version that participated in the CADE'96 theorem proving competition. The system was built on top of our toolkit of data structures and algorithms for automated deduction in rst-order logic with equality, and was devised mainly to test the performance of this toolkit.
The objective of this study is to compare the results of the Symptom Check List (SCL)-90-R and the General Health Questionnaire (GHQ)-28 administered on paper with the results of administration via Internet. Forty university students were asked to respond to the two questionnaires, first in one format (Internet or paper), and 1 week later in the other(More)
BACKGROUND Fibromyalgia is a syndrome with heterogeneous symptoms. The evaluation in the clinical setting usually fails to cover the complexity of the syndrome. This study aims to determine how different aspects of fibromyalgia are inter-related when measured by means of a self-reporting tool. The objective is to develop a more complete evaluation model(More)
BACKGROUND Fibromyalgia (FM) is a complex syndrome that affects many aspects of the patient's life and it is very difficult to evaluate in clinical practice. A recent study has developed the Combined Index of Severity of Fibromyalgia (ICAF), an instrument that evaluates diverse aspects of FM and offers five indices: emotional, physical, active coping,(More)
BACKGROUND The aim of this study was to explore the effectiveness of Internet-delivered cognitive-behavioral therapy (iCBT) in treating fibromyalgia (FM) compared with an identical protocol using conventional group face-to-face CBT. METHODS Sixty participants were assigned to either (a) the waiting list group, (b) the CBT group, or (c) the iCBT group. The(More)
BACKGROUND The Internet is an optimal setting to provide massive access to tobacco treatments. To evaluate open-access Web-based smoking cessation programs in a real-world setting, adherence and retention data should be taken into account as much as abstinence rate. OBJECTIVE The objective was to analyze the usage and effectiveness of a fully automated,(More)
The objectives of this study are to describe appropriateness and drug treatment of comorbidities in fibromyalgia (FM). Cross-sectional study of a group of patients. Number of drugs, indication, duration and appropriateness of prescriptions were evaluated. Patients were classified as: group 1, (FM/FM) previous FM diagnosis and fulfilling criteria; group 2,(More)
The aim of this study was to establish the cutoff points in the Combined Index of Fibromyalgia Severity (ICAF) questionnaire which allow classification of patients by severity and to evaluate its application in the clinical practice. The cutoff points were calculated using the area under the ROC curve in two cohorts of patients. Three visits, basal, fourth(More)
This paper analyzes the situation of on-line clinical psychology in Spain. Internet is becoming one of the principal tools for people to access to psychological information. Thus, users will be biased by the contents of the sites they contact to. Psychologists should pay attention to what kind of services are being spread through the Internet. To do this, a(More)