The lack of everyday application of traditional tests is known as low ecological validity. Behavioural
The Behavioural Assessment of the Dysexecutive Syndrome (BADS) was designed to address the problems of traditional tests and evaluate the everyday problems arising from DES. BADS is designed around six subtests and ends with the Dysexecutive Questionnaire (DEX). These tests assess executive functioning in more complex, real-life situations, which improves their ability to predict day-to-day difficulties of DES. The six tests are as follows:Rule Shift Cards - Assesses the subjects ability to ignore a prior rule after being given a new rule to follow. Action Program - This test requires the use of problem solving to accomplish a new, practical task. Key Search - This test reflects the real-life situation of needing to find something that has been lost. It assesses  the patients ability to plan how to accomplish the task and monitor their own progress. Temporal Judgment - Patients are asked to make estimated guesses to a series of questions such as, "how fast do racehorses gallop?". It tests the ability to make sensible guesses. Zoo Map - Tests the ability to plan while following a set of rules. Modified Six Elements - This test assesses the subjects ability to plan, organize and monitor behaviour.The Dysexecutive Questionnaire (DEX) is a 20-item questionnaire designed to sample emotional, motivational, behavioural and cognitive changes in a subject with DES.
This treatment alone is not wholly effective, and many people still experience other symptoms such as lung disease and noninfectious inflammatory symptoms. This treatment replenishes Ig subtypes that the person lacks and is given at frequent intervals for life, and is thought to help reduce bacterial infections and boost immune function. Before therapy begins, plasma donations are tested for known blood-borne pathogens, then pooled and processed to obtain concentrated IgG samples. Infusions can be administered in three different forms: intravenously (IVIg), subcutaneously (SCIg), and intramuscularly (IMIg). The administration of intravenous immunoglobulins requires the insertion of a cannula or needle in a vein, usually in the arms or hands. Because highly concentrated product is used, IVIg infusions take place every 3 to 4 weeks. Subcutaneous infusions slowly release the Ig serum underneath the skin, again through a needle, and takes place every week. Intramuscular infusions are no longer widely used, as they can be painful and are more likely to cause reactions. People often experience adverse side effects to immunoglobulin infusions, including:

swelling at the insertion site (common in SCIG)
chills
headache
nausea (common in IVIG)
fatigue (common in IVIG)
muscle aches and pain, or joint pain
fever (common in IVIG and rare in SCIG)
hives (rare)
thrombotic events (rare)
aseptic meningitis (rare, more common in people with SLE)
anaphylactic shock (very rare)In addition to Ig replacement therapy, treatment may also involve immune suppressants, to control autoimmune symptoms of the disease, and high dose steroids like corticosteroids. In some cases, antibiotics are used to fight chronic lung disease resulting from CVID.