Analysing the Action Research Arm Test (ARAT): a cautionary tale from the RATULS trial

Karabus trial - a cautionary tale.

[Validation of "Action Research Arm Test" (ARAT) in Chilean patients with a paretic upper limb after a stroke].

BACKGROUND Stroke is one of the main causes of disability and death in the world. Sixty three percent of stroke survivors require rehabilitation which is a complex functional recovery multidisciplinary task. AIM To determine the psychometric properties of the Action Research Arm Test (ARAT), that is used to assess the functional recovery of a paretic upper limb. PATIENTS AND METHODS Eighty ...

Improving the Action Research Arm test: a unidimensional hierarchical scale.

BACKGROUND The Action Research Arm (ARA) test is a performance test of upper extremity motor function which consists of 19 items divided into four hierarchical subtests. This multidimensionality has not yet been tested empirically. OBJECTIVE To investigate the dimensionality of the ARA test. DESIGN Cross-sectional study involving a sample of 63 chronic stroke patients. METHODS A Mokken sc...

Pseudothrombocytopenia--a cautionary tale.

Multichannel electronic cell counters are now in widespread use in haematology laboratories. Platelet counts are given routinely by many instruments and low platelet counts generate much further investigation. A falsely low platelet count may expose the patient to unnecessary and expensive investigation and treatment, and we report two illustrative cases. The platelet counts were performed on b...

Soliloquy: a Cautionary Tale

The Soliloquy primitive, first proposed by the third author in 2007, is based on cyclic lattices. It has very good efficiency properties, both in terms of public key size and the speed of encryption and decryption. There are straightforward techniques for turning Soliloquy into a key exchange or other public-key protocols. Despite these properties, we abandoned research on Soliloquy after devel...