Product Catalog
Generic Zantac (Ranitidine, Zantac® equivalent)
Ranitidine is in a group of medications called histamine-2 blockers. Ranitidine works by reducing the amount of acid your stomach produces. Ranitidine is used to treat and prevent ulcers in the stomach and intestines. It also treats conditions in which the stomach produces too much acid, such as Zollinger-Ellison syndrome. Ranitidine also treats gastroesophageal reflux disease (GERD), and other conditions in which acid backs up from the stomach into the esophagus, causing heartburn.
This product will arrive to you in 14-24 business days (free shipping worldwide)
150mg
| Quantity | Price | Price per pill | Returning customer price | Bonus | |
|---|---|---|---|---|---|
| 10 | € 35.72 | € 3.57 | € 31.92 | ---- | Add to cart |
| 20 | € 38.00 | € 1.90 | € 34.20 | ---- | Add to cart |
| 30 | € 40.28 | € 1.34 | € 35.72 | ---- | Add to cart |
Drug Medical Information
AGE AND BEHAVIOR: RESEARCH METHODS - A PRACTICAL VIEW-POINT
If cross-sectional comparisons are oversimplified and considered as age effects only, or cohort effects only, if longitudinal comparisons are considered as either environmental or age effects but not both, then there is a problem with interpretation. But, if the intrinsic confounding is recognized and kept in mind always, then meaningful interpretations are possible.
Cross-sectional studies are very adequate for ascertaining age differences. Descriptive statements can be clear and meaningful. When explanation is desired, however, the relative contributions of the maturational and cultural determination must remain uncertain. The interpretation must involve a logical judgment as to which types of functions are more bound to the culture than others. Religious beliefs, for example, would be more likely a function of culture than would reaction time. There is no reason to maintain, however, that reaction time, or any other behavior, for that matter, is totally free from cultural impact.
Longitudinal studies are preferable, but the cost is high, and it is important to weigh whether the cost is worth the potential results. (Advantages and disadvantages of longitudinal research will be discussed in the next chapter.) Longitudinal studies tell us much about how people change over time. Whether the change is due more to age than to the time-of-measurement factors is also a matter of what the measured behavior change is. Visual acuity is more likely to be related to age apart from time of measurement than is measured liberalism. Again, however, both may reflect the impact of time of testing.
The three sequential designs are the best strategies yet devised. They are difficult to arrange, costly to carry out, and imperfect, but they provide for the best approximations we can make at this time in tearing apart the confounded factors. However, because of the difficulty and expense, because they are relatively new, because of the inadequate interpretations that have been made, most of what is found in the aging literature is not the best. Although it seems likely that the number of studies using sequential strategies will increase, it also seems likely that cross-sectional studies will remain the bulwark of the data that are available. What was read in this book, therefore, and what probably will be read in future books, reflect this state of affairs. The bulk of the data in the study of aging involves the confounding of age and cohort—this should be kept in mind always.
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