Profound Multiple Learning Disabilities (PMLD)PMLD is another term to separate the most severely learning delayed from others with learning delays, so that support can be matched. Anything that means learning is severely affected can be included in this group. PMLD indicates a severe level of need, but little more as the subject is so vast. Click here for more information on PMLD from UKs NHS.See also Developmental Delay and Global Developmental Delay, above. For instance, an elephant has a brain that weighs about 5 kilograms, but in relation to its massive body, this is actually a small brain. On the other hand, a human brain, weighing only about 1.3 kilograms, is comparatively much larger when considering our body size.<\/p>\n
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For example, some babies are born with cataracts which make the lens of the eye go cloudy and obscures vision. Unless the cataracts are removed, the baby\u2019s visual cortex will not develop properly because they are not receiving sufficient visual stimulation during early life. However, if adults develop cataracts it will not affect their visual system because it has already developed. Unfortunately,nothing is ever easy in cognitive science, and clinicians will regularly faceone essentially insoluble problem, namely that of deciding how much improvementto go for. The point is that not all “normal” adults attain Piagetianformal operational thought in the first place (Long, McCrary, and Ackerman,1979; Shute, 1979), remaining concrete reasoners in adult bodies all theirlives!<\/p>\n
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