oodles 我該學這個字嗎?

oodles and oodles of sth 大量的某東西 (

在 Cambridge 字典裡,可以看到這個單字被標示為 「old-fashioned, informal」,老就算了,還不正式!但這個字看起來超級好記耶……

illusion, delusion, hallucination 錯覺,幻覺,妄想 的意思和用法

illusion 錯覺(正常人判斷錯誤): Something that is false or not real but that seems to be true or real, e.g.,
The video game is designed to give the illusion that you are in control of an airplane.

hallucination 幻覺(被影響的正常人): an experience in which you see, hear, feel, or smell something that does not exist, usually because you are ill or have taken a drug, e.g. A high temperature can cause hallucinations.

delusion 妄想(指瘋子的想法): A delusion is a fixed belief that is not amenable to change in light of conflicting evidence, e.g., she is under the delusion that we will finish on time.

Internal/External Validity: the Control of Independent, Dependent, and Extraneous Variables in Laboratory or Field Experiments.

  1. Internal Validity, External Validity
  2. Independent, Dependent, and Extraneous Variables
  3. Laboratory or Field Experiments

The internal validity is usually a mess, especially in the education research field, partially because of the extreme complexity regarding human brains and minds; partially because of a variety of different context and goals education could have. The problem not only lies in the control of independent or dependent part, but most seriously in the extraneous variables that are literally uncontrollable or even unnoticeable in the education field. Worse yet, to overcome this intrinsic complexity issue, the only way is to go big and make use of the large sample size to balance the uncontrollable bias. As a result, people go field experiments for more samples at lower cost, and in turn further worsen the internal validity.

In my research, we utilize the power of information technology. By moving the whole class online, we are able to track much more detailed information, especially the learning behavior information–which is of much higher quality compared to academic test or survey when it comes to scientific research. In my humble opinion, this is actually the beginning of a phenomenal revolution that opens a brand new door for education researchers to get to the truth.