Introduction-Invasive naturally means entering the body by cutting or inserting an instrument. In this case we talk about how fundamental the use of invasive techniques is to advance ever faster in the world of psychological studies. Studies have shown that the use of invasive techniques has changed the world of psychology because it gives researchers and experimenters a broader view of the brain. Many hospitals around the world still use invasive techniques known primarily as open surgery because many people can recover from this. operation or surgery. This is because small incisions are made and not one large one. It is still quite common to use invasive techniques because it is easier to remove any type of disease such as cancerous tumors. There are many ethical issues towards invasive techniques (open surgery) because people often debate whether we need to go further into the world of psychology using invasive techniques or why not just start using non-invasive techniques. This is believed because it is still barbaric to cut the human brain just to discover and learn about the human brain. However, using non-invasive techniques such as: • X-rays. • CT. • PET. • MRI and FMRI. • Electromagnetic recording (EEG). • SPECT. • SQUID. These techniques pose many harmful risks of getting sick due to the radiation coming out of these machines, the radiation may not affect you at that time, but over 10-20 years the radiation given off by these machines could cause cancerous tumors. It is believed to offer a broader and broader view of the human brain. The cost of using non-invasive techniques is much greater than invasive techniques (open surgery). As non-invasive techniques, they are molecular material with which to monitor body functions and responses, evaluate drug levels and follow pathological processes without subjecting patients to unnecessary discomfort and risks. Bibliography:www.st-andrews.ac.uk"University of St Andrews - Scotland's first university, founded in 1413." St-andrews.ac.uk, 2014. Web. 17 February 2014. .en.wikipedia.org"Main page." Wikipedia, 2014. Web. 17 February 2014. .en.m.wikibooks.org"Wikibooks." En.m.wikibooks.org, 2014. Web. 17 February 2014.lib.bioinfo.pl2014. Network. 17 February 2014. www.colombia.edu2014. Network. February 17, 2014.www.class.uidaho.edu"College of Letters, Arts, and Social Sciences." Class.uidaho.edu, 2014. Web. 17 February 2014. .